突然停车是一种非常可怕的经历，尤其是当你正以高速行驶时。

A sudden stop can be a very frightening experience, especially if you are travelling at high speed.

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现在的班机以高速作越洋飞行。

Airliners now cruise the ocean at great speed.

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以高速与高效著称的特快专递在中国盛行的同时，另一种邮件服务——“慢递”，作为一种新型产业出现在人们视野中。

While express mail represents efficiency and speed and is prevalent in China, there is another type of mail emerging as a new business: "future mail."

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and we like log algorithms, because they're really fast. A typical characteristic of a log algorithm is a pro-- or sorry, an algorithm where it reduces the size of the problem by a constant factor.

并且我们也很喜欢对数算法,因为它很快,对数算法的典型特性是高速，哦，抱歉，是他能以常数因子的速度,降低问题的大小，很明显。

麻省理工公开课 - 计算机科学及编程导论课程节选