1. fast:
例：
Don't drive so fast - there's ice on the
road. (路上有冰，別開太快。）
The new fighter aircraft flies almost twice
as fast as the old one. （新的戰(zhàn)斗機比舊的那架速度快一倍。）
She walked faster and faster, and then
started to run. （她越走越快，然后跑了起來。）
as fast as you can
He ran home as fast as he could. （他盡快跑回家。）
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2. quick: use this to tell someone
to come or go somewhere quickly
備注：''quick''常用于口語中。
例：
Come quick! your brother's on TV. （快來！你哥哥上電視啦?。?/span>
You'll have to walk quicker than that if
you want to keep up with me. （想跟上我，還得走快點。）
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3. swift: moving fast with a
continuous, flowing movement - used especially in literature
備注：''swift''常用于書面語中。
例：
a swift runner（跑得很快的跑者）
She wiped her tears away in one swift
movement. （她迅速拭去淚水。）
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4. at high speed: moving or working
very fast - use this about cars, trains, machines etc.
例：
Two cars raced past him at high speed. （兩輛車快速駛過他的身邊。）
a disk revolving at high speed（一張高速轉動的光盤）
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5. at top speed: if a vehicle moves
at top speed, it moves as fast as it can go - use this especially when a
situation is urgent and someone has to get somewhere very fast
例：
They headed east at top speed in pursuit of
the enemy ship. （他們全速向東進發(fā)，追尋敵船。）
At top speed, the Pave Hawk helicopter can
travel 221 miles per hour. （“鋪路鷹”直升機全速飛行時時速可達到221英里。）
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6. at breakneck speed: traveling
dangerously fast
例：
It took us an hour to get there, driving at
breakneck speed. （車開得超快，我們1小時就到了那兒。）
Jenny stepped onto her skis and sped off at
breakneck speed down the glistening, white mountain. （珍妮踩著滑雪板，全速沖下白雪皚皚的山峰。）
He drove away at breakneck speed. （他飛快地開（車）走了。）
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7. flat out: at the fastest speed
possible when using all the strength or power there is
例：
Going flat out, the BMW 325 will reach a
speed of 140 miles per hour. （寶馬325的最高時速可達140英里。）
The exercise involved running flat out for
two minutes and then resting for one minute. （這項訓練要求全速跑兩分鐘，再休息一分鐘。）
Everyone is working flat out to finish on
time. （為了按時完工，大家都全力工作，盡快干完。）
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8. like lightning: moving extremely
fast, often with a single sudden movement
例：
Somewhere a dog barked and, like lightning,
the cat darted into some bushes. （哪里的狗叫了一聲，這只貓像離弦的箭一樣躥進灌木叢中。）
He moved like lightning and caught the
little girl before she fell. （眼看那個小女孩就要摔倒，他像閃電一樣快速沖過去把她扶住。）
補充：
''like lightning''這個詞組里，''lightning''做名詞；''lightning''做形容詞時，也可以表達類似的意思。
例：
a lightning attack（閃電襲擊）
He moved at/with lightning speed and
caught the little girl before she fell. （眼看那個小女孩就要摔倒，他像閃電一樣快速沖過去把她扶住。）
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9. at speed: if a car or train is
traveling at speed, it is traveling fast
備注：''at
speed''是正式的用法。
例：
The train was already traveling at speed
when she tried to open the carriage door. （她想打開車門，此時列車正全速前進。）
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