沙漠化是指类似沙漠的生态环境扩张到原本并没有沙漠的区域。

The expansion of desert-like conditions into areas where they did not previously exist is called desertification.

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如果我们希望作为一个物种生存下去，就必须扩张到太阳系之中或超越太阳系。

If we want to survive as a species, we have to expand into the solar system and likely beyond.

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随着保护区变得越来越小以及人类的活动扩张到了这些保护区的边界，狮子跟人类的接触也就越来越多。

As conservation areas become smaller, lions are increasingly coming into contact with human populations, which are expanding to the boundaries of these protected areas.

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They expand north to Archangel, so this gives them a port, but a frozen one.

他们向北扩张到阿尔汉格尔,有了一个港口,但常年冰冻

耶鲁公开课 - 欧洲文明课程节选

And Mark has been extraordinary, as a leader, in maintaining a very high bar and at times, walking away from people who are receiving outstanding recommendations but either don't fit from a cultural standpoint or they're not going to scale and they'd be the wrong person a year or two from now.

作为Facebook的领导者，马克始终坚持选人标准，从不手软，他经常会放弃一些,得到强有力推荐的应聘者,他们要么是在文化方面不契合,要么是因为，如果公司没打算扩张,那他们在一到两年内,会成为错误选择。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选