They may be triggered by random events, and can be quite unpredictable.

它可能有随机触发，并且相当难预期。

youdao

This means that state entry and exit actions will not be triggered by the transition.

这意味着状态进入或退出操作将不会被转换触发。

youdao

Some may be triggered by a traumatic event while others are linked to physical problems.

一些可能会导致生理问题，一些甚至导致外伤。

youdao

This can be triggered by bereavement, a trauma or even constantly worrying about money.

BBC: Wales

When it happens at all it tends to be triggered by some sort of life trauma.

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Dr. Yukio Fukuyama, a juvenile epilepsy expert, said that "television epilepsy" can be triggered by flashing, colorful lights.

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