产生这种循环的因素有两个：食用植物和食肉动物。

Two factors appear to be generating the cycle: food plants and predators.

youdao

一品脱半的啤酒就可以产生这种效果，对男性来说，这种效果可以持续24小时。

A pint and a half of beer can produce the effect and in men it may last 24 hours.

youdao

你会对水痘病毒产生这种初始应答，这种初始应答可能过于缓慢，无法预防水痘。

You would have this initial response for chickenpox, and this initial response might be too slow to prevent you from getting chickenpox.

youdao

And those are the moments of crisis in the society I don't think we were at anything like that in this country right now.

这时社会中便产生了危机,我不认为现在美国,到了这种地步。

普林斯顿公开课 - 人性课程节选

And there's a real spatial sense here, that it's being generated at the base of the world, and it goes up and it transforms these mountains into papier-mache.

这里有一种真实的空间感，是从世界的基本中产生的，这种空间感上升并转化成这些纸型的山。

耶鲁公开课 - 1945年后的美国小说课程节选

You would have this initial response, now that initial response might be too slow to prevent you from getting chickenpox.

你对水痘病毒产生初始应答,这种初始应答可能,过于缓慢,无法预防水痘

耶鲁公开课 - 生物医学工程探索课程节选