你曾提出的是否要继续实施“高铁二号”项目问题。 一条从伦敦通向伯明翰，利滋，时速超过255千米小时的铁路线。

SIR – You questioned whether our proposed scheme “High Speed Two”, a 225mph railway line from London to Manchester and Leeds by way of Birmingham, “is a good idea” (“The need for speed”, March 5th).

youdao

鼹鼠在一个小时内能挖3.5米深的洞穴。

A mole can dig at a rate of 3.5m per hour.

youdao

如果车速限制是100千米每小时，生产一个足够大、足够强、时速能达到每小时200公里的引擎有什么意义呢？

What's the point in producing an engine that is big and powerful enough to go like 200 kilometers an hour when the speed limit is only 100?

youdao

We don't usually do our chemistry calculations in miles per hour, so let's switch that to 42 meters per second, so it's -- sorry, it's 94 miles per hour.

在化学计算中我们很少,用英里每小时，所以我们把它换算为42米每秒，对不起，它是94英里每小时。

麻省理工公开课 - 化学原理课程节选