In the future, scientists could use drugs to 'turn on' genes, which could trigger hair growth.

未来科学家可以用药物来“激发”基因，这样就可以刺激毛发的生长了。

youdao

The trap does not close every time a trigger hair is touched, because a lot of energy would be used up this way.

并非短毛每次被触动时，陷阱都关闭，因为这样会消耗很多能量。

youdao

This is how the trap knows to snap8 on a moving insect and not on a raindrop which only touches a trigger hair once.

这就是陷阱如何知道困住的是一只移动的昆虫而非雨滴的原因，因为雨滴只会碰触一次短毛。

youdao

Chemical sprays like air fresheners,hair spray, household cleaning products and even strong perfumes can also trigger an asthma attack.

VOA: special.2009.07.28

Chemical sprays like air fresheners, hair spray,cleaning products and even strong beauty aids can trigger an asthma attack.

VOA: special.2010.09.07

This suggests that the same signals that trigger the fat expansion will also trigger hair regrowth.

FORBES: Scientists Discover a Possible Key to Reversing Baldness

In a crisis, the temptation would always be to hold these missiles on a hair trigger, to be launched on warning of an incoming attack rather than lost to an enemy strike.

ECONOMIST: It's worse than you thought

What is more, it is a hair trigger.

ECONOMIST: America and Iraq