People should know the causes of their asthma symptoms and try to avoid these triggers.

VOA: special.2009.07.28

It turns out that cultures, different cultures, including differences between America and Japan and the American South and the American North, have somewhat different emotional triggers and emotional baselines to respond to.

看起来文化，不同的文化，包括美日文化的不同,南北美文化的不同，有不同的情感触发点,和应对的情感底线。

耶鲁公开课 - 心理学导论课程节选

Many migraine sufferers say hot weather and low barometric pressure can act as triggers.

VOA: special.2009.03.18

Triggers are things that cause the asthma sufferer's airways to swell.

VOA: special.2009.07.28

Food additives like salt and monosodium glutamate also may be triggers.

VOA: special.2011.05.03

Different people are affected by different triggers.

VOA: special.2009.07.28

So if we can get better at giving people triggers of when to leave early, which we will work very hard on doing, then people evacuating themselves is the safest thing to do as long as it's early enough."

VOA: standard.2009.06.24