它只在血液流动较缓的静脉中起作用。

It works only in the veins, where the blood flow is slower.

《柯林斯英汉双解大词典》

这种病毒仍然在血液中起作用。

The virus is still active in the blood.

《牛津词典》

而且，尽管有许多利益在起作用，但从这个故事中受益最大的参与者之一是媒体：“极端”气候的念头只会带来更有吸引力的新闻。

While many interests are at work, one of the players that benefit the most from this story is the media: the notion of "extreme" climate simply makes for more compelling news.

youdao

And... a lot of, a lot of the role was played by the colonial powers within the conflict.

然后呢。,有很多事取决于殖民力量,在冲突中起的作用。

普林斯顿公开课 - 人性课程节选

They're making that because you need this protein insulin, it's a hormone, and it's important for sugar metabolism in your body.

它们产生胰岛素蛋白是因为你需要它,胰岛素是一种激素,它在糖代谢中起着非常重要的作用

耶鲁公开课 - 生物医学工程探索课程节选

But I wonder what kind of, if this might even make a powerful incentive for military recruitment today.

但我很好奇想问哪一种，这是否仍可在今日的军人,召募中起强力的激励作用。

耶鲁公开课 - 政治哲学导论课程节选