pre-earthquake的用法和樣例：
例句
- The flood usually happens shortly before or after the earthquake, or accords with the foreshock and aftershock.
洪澇的發生時間有可能與震鏈的后震或前震比較接近，或與震鏈推移之進程基本吻合，反映了鏈程中的場態效應。 - Even in areas where foreshocks are fairly common, there is no way of distinguishing a foreshock from an independent earthquake.
即使是在前震相當普遍的地區，也無法將前震與獨立地震區分開來。
