This is not surprising, given that precipitation is one of the two external triggering mechanisms—the other being seismic activity—involved in the formation of landslides.
考虑到降水是涉及滑坡形成的两个外部触发机制之一——另一个是地震活动，这并不奇怪。
Herd behaviour and psychological feedback loops play a critical part in all stock market crashes but analysts have also tried to look for external triggering events.
从众行为和心理上的反馈回路在所有股市崩溃中起到关键作用。不过分析家们也试图找到外部的触发事件。
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