If your friend cannot stop talking about something because she thinks it is important, you might say she has a bee in her bonnet.

VOA: special.2009.06.28

And then you realize that you've put on your most expensive pair of shoes this mooring, and if you stop to take them off, it might be too late and the child might drown.

你意识到你正穿着,你最贵的一双鞋，但是，如果你停下来脱鞋，就来不及救这个小孩，小孩可能会溺死。

普林斯顿公开课 - 人性课程节选

So if you could stop a tumor from being able to develop blood vessels you might be able to stop its growth at a stage where it's not harmful.

所以,如果我们能通过阻止血管的生成,来阻止肿瘤的发展,就可以在肿瘤还处于良性阶段时扼制它

耶鲁公开课 - 生物医学工程探索课程节选