Relativity says that light always moves in a straight line through empty space, and always at the same speed in a vacuum, no matter what your observation point.

它指出光在真空中走直线，且在真空中光速恒定，不论你的观测点如何。

youdao

The person can't see your reaction, so always confirm that you have understood each point that has been made.

对方无法看见你的反应，所以要确保你理解对方所说的每一点。

youdao

One eager beaver raised his hand and said, "The point is that no matter how full your schedule is, if you try really hard you can always fit some more in."

一位同学迫不及待地踊跃举手回答道：您要说明的问题是不管日程安排有多紧凑、多忙碌，只要你肯努力，总可以基础一些时间来安排做更多的事。

youdao

So to go to your other point, I think that we have always taken the approach -- and I have made it clear here, the President has made it clear, and others have -- that the actions we take to reduce the deficit, if we do it in the right way, will be positive for economic growth.

WHITEHOUSE: Press Briefing

And you point out in your book that indeed great writers were always the classroom for the next generation.

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The point is that you always dress one step further up the clothing ladder than your prospect, but not two.

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