★ forecast
forecast v. & n. 英文解释：to publicly say what will happen in the future with the weather or the economic or political situation, esp. when you have special or technical knowledge
- weather forecast
- the company’s annual sales forecast
- Rain has been forecast for tomorrow.
- The Federal Reserve Bank forecasts the economy will grow 8% this year.
【扩展】
- foretell（预言；预兆、预示） / predict （只能表示“预言“）……
- Precautions of this sort are necessary, for it is impossible to foretell （预言）the exact nature of the difficulties which will confront the pot-holer.
- Considering how recent these developments are, it is even more remarkable that as long ago as the 1960s, an Englishman, Leon Bagrit, was able to predict （预言）some of the uses of computers which we know today.
- Timely snow foretells （预兆、预示）a bumper harvest.
- forebode v. 预示；预感；预兆 （强调不愉快的事）
- Black clouds forebode a storm.
- prophesy （强调超自然能力）vt. 预言；预告；vi. 预言；预报；传教
- Jesus prophesied that one of his disciples would betray him.
★ speculative
speculative adj. 英文解释：based on guessing, not on information or facts
- His conclusions are purely （推测的）speculative.
- speculative（投机的） investments
【同根词】
- speculate v. 含义1：猜测
- We can only speculate on the reasons for his sudden resignation.
- speculate v. 含义2：to buy goods, property, shares etc., hoping that you will make a large profit when you sell them 投机
- speculate in stocks
- speculation n. 投机；推测；思索；投机买卖
- property speculation
【近义词】表达“推测”：
- conjecture
- guesswork / guess work
★ blizzard
blizzard n. 英文解释：severe snowstorm thunderstorm
【扩展】表达“极端天气”：
- snowstorm n. 暴风雪；雪暴
- windstorm n. 暴风
- sandstorm n. [气象] 沙暴；大风沙
- squall n. 暴风；vt. 起风暴
- dust devil n. 尘卷风
- cyclone n. 旋风；[气象] 气旋；飓风
- hurricane n. 飓风，暴风
- typhoon n. [气象] 台风
- tornado n. [气象] 龙卷风；旋风；暴风；大雷雨
★ deteriorate
- Alan’s health has deteriorated.
- America’s deteriorating economy
- deteriorate into … 恶化成了…
- The discussion deteriorated into a bitter quarrel.
【近义词组】表达“变糟，恶化”：
- degenerate n. 堕落；vt. 使退化；恶化
- Our relationship has degenerated over the years.
- degenerate into … 恶化成了…
- Don’t allow your comments degenerated into a personal attack.
- worsen v. 变糟，恶化
- The weather worsened during the night.
- get worse v. 变坏
- go from bad to worse 每况愈下；越来越糟；江河日下
- go downhill （质量、健康等）每况愈下，走下坡路，恶化
- Moving in together was a mistake, and our relationship rapidly went downhill.
★ turbulent
turbulent adj. 英文解释： air or water moving violently and unevenly
- turbulent waves
- the turbulent times of the French Revolution
【同根词】
- turbulence n. 骚乱，动荡；[流] 湍流；狂暴
- political turbulence social turbulence
【词根】
- “turb” = disturb 搅乱
- turbid adj. 浑浊的；混乱的；雾重的
- turbine n. [动力] 涡轮；[动力] 涡轮机
- perturb vt. 扰乱；使…混乱；使…心绪不宁
- Mother was perturbed by my illness.
- imperturbable adj. 冷静的；泰然自若的
★ humidity
【同根词】
- humid adj. 潮湿的；湿润的；多湿气的 （只能指空气）
- humid air / atmosphere
- humid summer nights
【近义词】【辨析】表达“湿的”：
- wet 湿（内部、外部）
- Her hands were wet.
- a wet sponge
- moist （褒义）潮湿的
- damp （贬义）潮湿的
- Bring me a moist towel.
- a cold, damp collar
★ meteorologist
- meteorologist n. 气象学家
- meteorology n. 气象状态，气象学
【词根】
- “meteor”= shooting / falling star n. 流星；[气象] 大气现象
- meteor shower
- meteor swarm
- meteorite
- asteroid 小行星
★ deviation
deviation n. 英文解释：a difference from what is expected or acceptable
- Left deviation
- Right deviation
- sexual deviation
- deviation from 偏离…
- Any deviation from the party's faith is seen as betrayal.
- At noon the spaces between the sensors will hide fluctuations that the computer will not know about, tiny deviations from the average.
【同根词】
- deviate from 偏离…
- deviate from one’s plan / principles
- deviant n. 不正常者；偏移值；变异物 adj. 不正常的；离经叛道的
- a sexual deviant
【词根】
- “de” =away from
- + “vi(a)”=道路
- + ate（动词字根）
- via prep. 渠道，通过；经由
- go from London to Washington via New York
- viable adj. 可行的；能养活的；能生育的
- a viable proposal
- economically viable
- obviate vt. 排除；避免；消除
- The new treatment obviates the need for surgery.
课文讲解
知识点（1）
- butterfly n. 蝴蝶；蝶泳；举止轻浮的人；追求享乐的人
- a social butterfly
- have butterflies (in one’s stomach) 忐忑不安
- It was the morning of the World Cup Final and most of the players had butterflies (in their stomach).
知识点（2）课文背景介绍
- chaos theory n. 混沌理论
- Small changes in initial conditions can lead to large-scale and unpredictable variation in the future state of the system.
- A frequent metaphor for one aspect of chaos theory is the Butterfly Effect: butterflies flapping their wings in the Amazon affect the weather in Chicago.
知识点（1）
- Beyond two or three days 超过了两三天
- beyond prep.
- 课文写法替换：
- after …;
- later than …
- Exceeding two or three days, …
知识点（2）
- … the world's best weather forecasts are speculative …
- 课文写法替换：：
- … are based on speculation / conjecture.
- … are based on guesswork / guess work.
知识点（3）
- … they are worthless.
- 课文写法替换：表达“没有价值的”
- … they are valueless
- … they are useless
- … they are of no earthly use.
- … they are totally useless.
知识点（1）
- reason for / behind 背后的原因
- The Butterfly Effect is the reason for / behind it.
知识点（2）
- 课文写法替换：表达“是…的原因”
- The Butterfly Effect accounts for it.
- The Butterfly Effect underlies it.
- The reason is the Butterfly Effect.
- The reason lies in the Butterfly Effect.
- The reason is because of the Butterfly Effect. X错误表达，reason和because重复
语法分析：
For small pieces of weather（介词短语做状语） — and to a global forecaster（介词短语做状语）, small can mean thunderstorms and blizzards（插入语） — any prediction deteriorates rapidly.
知识点（1）
- mean v. 英文解释：be likely to result in … 导致、意味着…
- The merger will mean the eventual closure of the company’s Shanghai Office.
知识点（2）
- deteriorate vi. 恶化，变坏 ; vt. 恶化
- 课文写法替换：表达“恶化，变坏”
- … any prediction gets worse / degenerates / becomes inaccurate rapidly.
语法分析：
Errors and uncertainties multiply, cascading upward through a chain of turbulent features, from（from …介词短语当后置定语） dust devils and squalls up to continent-size eddies that only satellites can see. （cascading … 非谓语动词做状语，修饰multiply）
知识点（1）
- multiply v. 英文解释：to increase by a large amount or number, or to make sth. do this （使）大幅增加
- Within the last 10 years, both sales and profits have multiplied.
- Smoking multiplies the risk of heart attacks.
【近义词】表达“大幅增加”：
- snowball
- Unemployment snowballed at the beginning of 1980s.
- proliferate
- Small businesses have proliferated in the last ten years.
- mushroom
- Trade between the two countries has mushroomed.
- explode
- China’s population exploded after 1949.
- population explosion
知识点（2）
【近义词组】表达“一连串的”：
- a chain of …
- a series of …
- a train of …
- a string of …
- a succession of …
- a progression of …
知识点（3）
- feature n. characteristic 特征
知识点（4）
- from A to B 从A到B
- from A up to B 从A一直到到B
语法分析：
The modern weather models work with a grid of points of the order of 60 miles apart（介词短语当后置定语）, and even so, some starting data has to be guessed, since(因为) ground stations and satellites cannot see everywhere（原因状语从句）.
知识点（1）
- work v. 英文解释：(of a machine, device, etc) function; operate （指机器、设备等）运作，运转
- This machine works by electricity.
- The delete key doesn't work.
知识点（1）
- grid n. 英文解释：a pattern of straight lines that cross each other to form squares （地图上的）坐标方格
- streets laid out on a grid pattern
知识点（3）
- of / in / on the order of … = approximately 大约、大概
- The house cost him something on / in / of the order of $200,000.
- The house cost him something in the neighborhood / vicinity of $200,000.
- The house cost him approximately $200,000.
知识点（4）
- starting adj. beginning 最初的
【近义词】表达“最初的”：
- initial adj. 最初的；字首的
- at the initial stage / phase
- incipient adj. 初期的；初始的；起初的；发端的
- incipient tumor
- the incipient light of day
- opening adj. 开始的；开篇的；开头的
- his opening remarks
- the opening scene of the movie
- preliminary adj. 预备性的；初步的；开始的
- a preliminary exam / contest
语法分析：
But suppose（祈使句） （省略that，宾语从句）the earth could（虚拟语气） be covered with sensors spaced one foot apart（后置定语）, rising at one-foot intervals all the way to the top of the atmosphere（all the way to…介词短语做状语）. （rising... 方式状语）
知识点（1）
- space v. 将……均匀隔开
- Space your workouts two days apart to avoid sore muscles.
- Bean plants should be spaced three inches apart.
知识点（2）
- interval n. 含义1：（两事件中的）间隔时间
- …, and by measuring the time interval between the taps and the receipt of the echoes the depth of the sea at that point can be calculated.
- interval n. 含义2：（物体之间的）间隔空间
- They planted trees in the intervals between the houses.
知识点（3）
- all the way 一 直 ……
- He ran all the way home.
- Eventually the turtle has been butted all the way down to the floor of the tank.
语法分析：
suppose（祈使句）（省略that，宾语从句）every sensor gives perfectly accurate readings of temperature, pressure, humidity, and any other quantity a meteorologist would want（定语从句）.
知识点（1）
- reading 读数
- take the meter reading 查表
- read the meter 查表
语法分析：
看作省略了suppose that的祈使句：
Precisely at noon（时间状语） an infinitely powerful computer takes all the data and calculates what will happen at each point（地点状语） at 12.01, then 12.02, then 12.03... （时间状语） （what… 宾语从句）
知识点（1）
- Precisely at noon 正午时分
- = at high noon
- = at 12 o’clock sharp
- = at punctually 12 o’clock
知识点（2）
- infinite adj. 无限的，无穷的；无数的；极大的
- The universe is infinite.
【反义词】
- finite adj. 有限的；限定的
- Human knowledge is finite.
【形近词】
- infinitive adj. 原形的，不定式的
- definite adj. 一定的；确切的
- indefinite adj. 不确定的；无限的；模糊的
- an indefinite answer
- definitive
- a definitive verdict
知识点（2）
【近义词组】表达“计算”：
- work out
- figure out
- compute
- reckon
- The inflation is reckoned to be 10%.
语法分析：
At noon （时间状语）the spaces between the sensors（后置定语） will hide fluctuations that the computer will not know about（that ...定语从句，修饰fluctuations）, tiny deviations from the average（fluctuations的同位语）.
知识点（1）
【近义词】表达“大幅增加”：同义替换
- … will have snowballed to …
- … will have proliferated to …
- … will have rocketed to …
- … will have soared to …
知识点（2）
- scale 程度、规模、范围
- on a small scale 小规模
- on a limited scale 有限规模
- on a large / grand scale 大规模
- on a / an colossal / enormous / gigantic scale 特大规模
- on a national / nationwide scale 全国规模
- on a / an global / international / world / worldwide scale 全世界规模
知识点（3）
【近义词组】表达“等等”：
- and so forth
- etc. (et cetera)
- and the like
- and what not
知识点（3）
- global size 全世界规模
- global scale 全世界规模
- international / world / worldwide scale 全世界规模