It's a virulent strain that occurs when a person with TB fails to complete the six to nine-month course of medication or catches TB from another person who is ill with a drug resistant-strain.

VOA: standard.2010.07.12

And you'll be able to tell them when it occurs, how it happens, what it's related to.

而且你还可以告诉他们这事发生的时间、怎么发生的，以及它与什么事情有关。

I get so upset 课堂 - SpeakingMax英语口语达人

That's why it's natural to point to the moment of star when we say that's when my death occurs.

所以很自然的，我就死在星号这里。

耶鲁公开课 - 死亡课程节选

This is when it first occurs to her that the whole world is being organized around her: Nothing of the night's could touch her. Nothing did.

这是她第一次意识到,她周围的整个世界是被安排好的：,那一夜没有什么能够触动得了她，没有。

耶鲁公开课 - 1945年后的美国小说课程节选

Dilution occurs when the company changes the number of shares asymmetrically-- not changing it for everybody.

摊薄是指公司,非对称地改变股数,而不是一概而论

耶鲁公开课 - 金融市场课程节选