The truth of the matter is if you look at the technology industry, there's always a few big guys, some medium size guys, lots of small guys, and the names are always changing because the industry is so darn dynamic, and there's so much new stuff being invented.

真相是，如果你回首科技行业，人总会分为三六九等，耳熟能详的名字总在变化,因为这个行业发展实在太快了，有如此多的新事物被发明出来。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

It just depends on the areas of town, I think. They're always changing, you know.

我认为这取决于城市中不同的区域。他们总是在不停地变化。

上西区的富人 - SpeakingMax英语口语达人

They were always mobile, always going somewhere, always changing.

他们总是流动的,总有新的目的地,总是不断变化着的

耶鲁公开课 - 美国内战与重建课程节选

I mean, you have a very dynamic business sector here. You know, it's always changing.

这儿有一个很动态的商业行业。它一直在变化。

机会之地，伦敦 - SpeakingMax英语口语达人

Everyone knows from calculus that if you're trying to find a function about which you know only the derivative, you can always add a constant to one person's answer without changing anything.

学过微积分的人都知道,如果你想根据已知的导数,求出其原函数,你总是可以给某人的答案,随便加一个常数,且不影响结果

耶鲁公开课 - 基础物理课程节选