"So,for this reason, we're saying that a bloodbath has occurred over the weekend."

VOA: standard.2009.05.11

The idea of risk, that economic risks can be pooled, is an intuitive one that has occurred to people throughout history.

风险理论，即认为经济风险可以分摊，是历史过程中,人们逐渐发现的理论。

耶鲁公开课 - 金融市场课程节选

Call what has occurred by the end of that sequence of events, "Bodily death."

把这些发生在最后阶段的事称做,肉体死亡

耶鲁公开课 - 死亡课程节选

But the torrential rains have not stopped. They are expected to continue for several more weeks, enough time to add to the already extensive damage that has occurred.

VOA: standard.2009.09.05

This idea that humans have evolved, that physical changes have occurred in humans as a consequence of their food environment, has led us to where we are now.

探讨人与食物的关系,探讨人类机体,由于食物环境而产生的变化,是我们今天坐在这里的原因

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

"When our government has information on a known extremist and that information is not shared and acted upon as it should have been and this extremist boards a plane with dangerous explosives that could cost nearly 300 lives, a systemic failure has occurred.

VOA: standard.2009.12.29

None.No Israeli government has ever taken this step and nothing remotely like this occurred during the Bush administration."

VOA: standard.2009.11.25