So, keep that in mind when we're talking about atomic radius, I'm not suddenly changing my story and saying, yes, we do have a distinct radius.

因此，当我们讨论原子半径的时候要时刻记住这一点，我并不是在突然改变自己的说法，说是的，我们的确有一个准确的半径。

麻省理工公开课 - 化学原理课程节选

It's one of the most rapidly changing, hard to keep up with areas because someone can set up an electronic exchange overnight and suddenly become a base for trading trillions of dollars of securities.

经纪业是一个变化最快的行业之一,人们很难跟上它的步伐,因为人们可以在头一天晚上,设置一个电子交易,一夜之间,他就能在证券市场赚到千亿美金

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