The success of their agriculture system depended upon them knowing when the river would change.

他们农业系统的成功归功于他们了解河流何时会变化。

youdao

Anyone who has toiled through SAT will testify that test-taking skill also matters, whether it's knowing when to guess or what questions to skip.

任何一个曾经辛苦地经历过 SAT 考试的人都可以证实，应试技巧也很重要，即是否知道什么时候该猜测答案或者什么样的问题该跳过去。

youdao

youdao

As Lincoln got on the train that would take him to Washington, he said: "I now leave, not knowing when -- or whether ever I may return.

VOA: special.2009.07.23

He struggles when he is there on the floor in their company, wanting to escape from their company, knowing that he doesn't want this.

他挣扎着，躺在地上,想逃离这些挥之不去的人群，他不想要这一切。

普林斯顿公开课 - 人性课程节选

Now, when you listen to it then, again, knowing that, you hear it that way.

当你再次听到这句话时,你便知道,你是听到的是这个

耶鲁公开课 - 心理学导论课程节选

Knowing when to harvest the agave's heart--the 50-to-80-pound mass from which juices are extracted--is an art.

FORBES: Mexican Invasion

But, ultimately, death comes, and no one is good at knowing when to stop.

NEWYORKER: Letting Go

From a momentum perspective, the trick is knowing when to get off the train.

FORBES: All That Is Gold Does Not Glitter