For a normal earthquake this is when rock snaps, or rock grinds along a fault line, or rock layers drop or heave.

对于一个正常的地震，这是当岩石扣，或岩石研磨沿着断层线，或岩石层下降或隆起。

youdao

Following normal operation, the reservoir's level dropped as water was released downstream during the winter and early spring 2008 and was at a low level when the Wenchuan earthquake occurred.

水库正常运转以后，因为在冬季和2008年春天早期的时候向下游放水，水库水位一直在下降。而汶川地震发生的时候，水库正处在一个低的水位上。

youdao

Following normal operation, the reservoir's level dropped aswater was released downstream during the winter and early spring2008 and was at a low level when the Wenchuan earthquake occurred.

水库正常运转以后，因为在冬季和2008年春 天早期的时候向下游放水，水库水位一直在下降。 而汶川地震发生的时候，水库正处在一个低的水位上。

youdao

The Paris-based company said Monday that following the earthquake in Japan, an important market, local teams worked hard to bring a gradual return to normal business.

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