词典释义：
the rate at which someone or something moves or operates or is able to move or operate
速度
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the car has a top speed of 147 mph .汽车最高时速是１４７英里。
[mass noun]rapidity of movement or action
快；迅速
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the accident was due to excessive speed 这次事故是因为速度太快而造成的
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figurative 〈喻〉they were bemused by the speed of events. 他们被事件的迅速变化惊呆了。
each of the possible gear ratios of a bicycle
（自行车的）挡，变速挡。
〈主美或旧〉 机车的排挡。
the sensitivity of photographic film to light
感光度。
the light-gathering power or f-number of a camera lens
快门速度。
the duration of a photographic exposure
照片曝光的时间。
[mass noun]
〈非正式〉 苯异丙胺，安非他明（尤指甲基苯丙胺）。
[mass noun]
〈古〉 成功；繁荣
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wish me good speed .祝我成功吧。
[no obj., with adverbial of direction]move quickly
快速移动
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I got into the car and home we sped. 我上了车，迅速向我们家里驶去。
(
（驾车者）违章超速行驶
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the car that crashed was speeding .撞毁的那辆车超速行驶了。
(
加快速度
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you force yourself to speed up because you don't want to keep others waiting. 你要强迫自己加快速度，因为你也不想让别人一直等你。
(
使加速
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recent initiatives have sought to speed up decision-making .最近的主动是为了寻求加快决策。
[with obj.]
〈古〉 使兴旺发达；帮助成功
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may God speed you. 祝你成功。
[no obj.]
〈非正式〉 用（脱氧麻黄碱之类的）兴奋剂成瘾；受到（脱氧麻黄碱之类的）影响
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more kids than ever are speeding, tripping, and getting stoned .越来越多的年轻人服用兴奋剂、吸毒和酗酒。
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at speed quickly 迅速地a car flashed past them at speed. 一辆车从他们身边疾驰而过 -
up to speed operating at full speed 全速运行 -
（of a person or company） performing at an anticipated rate or level （人，公司）以预期的速度（或水平）进行
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（of a person） fully informed or up to date （人）无所不晓的；掌握最新信息的，跟上时代的
that reminds me to bring you up to speed on the soap opera. 那提醒我要让你跟上那剧情
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at a/the speed of ... 以...的速度
真题例句：
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at a high/low speed 以高/低速
真题例句：
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speed sth up 使...加速
真题例句：
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speed up sth 加快速度
真题例句：
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high-speed railway 高铁/读书速度
真题例句：
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reading speed 读书速度
真题例句：
"Old English
