When this occurs, the prey population can rebound.

当这种情况发生时，猎物的数量就会反弹。

youdao

When this occurs, our training needs a jump-start.

这时我们的训练需要一些推力。

youdao

When this occurs, I find myself in an uncomfortable situation.

每当这类事情发生时，我都会感觉自己的境地很是难堪。

youdao

"So,when an event like this occurs, it is incumbent upon a Democrat to react quickly and decisively, and Obama failed to do it."

VOA: standard.2010.01.06

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

When I think about this situation, an analogy always occurs to me.

每当我想到这种情境时,总会联想到一个类比

耶鲁公开课 - 死亡课程节选

When this occurs companies are risk remaining where they are rather than what they might become.

FORBES: Second Inaugural Address: A Lesson for Executives

When this occurs, I may have to delay my patients' appointments to tend to them.

CNN: Long wait at the doctor's office? Blame the patients

When this occurs, it's called chronic upper airway cough syndrome (or postnasal drip).

CNN: Mystery cough? 8 possible culprits