This can last for a long time if you don't head it off as soon as possible and take action.

如果不尽快采取行动加以阻止，这种不良情绪会持续很长时间。

youdao

If doctors can predict which patients are beginning to reject the transplanted organ, they could try to head it off, she said.

如果医生们能够预测患者何时开始器官排斥，那么它们就会试图解决此问题。

youdao

Thankfully, I've learned to switch off and let it go over my head.

谢天谢地，我已经学会了不再烦恼，把它抛到脑后。

《柯林斯英汉双解大词典》

When a baby's head is stuck in the birth canal for an extended period of time, it cuts off the blood supply to the woman's surrounding organs.

VOA: special.2010.08.09

And the reason is, and this will come up on the problems and a lot of students end up using this equation, which is why I want to head it off and mention it ahead of time, we can't use an equation because this equation is very specific for light.

原因是，很多同学在解题时,都会用这个方程，所以我要,事先提醒你们一下,我们不能用这个方程，因为它只对光是用。

麻省理工公开课 - 化学原理课程节选

It's really hard to think of all stuff off the top of my head.

脑子里一时想到的都说出来还真难呢。

只要是音乐就好 - SpeakingMax英语口语达人

The best thing you can do is head it off ahead of time.

FORBES: Small Biz Bum Alert

And what steps, if any, are being taken to head it off?

WHITEHOUSE: Press Briefing

What specific policies are you considering to help head it off?

WHITEHOUSE: President Obama and Chancellor Merkel Press Conference