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foreshock是什么意思

foreshock

美['foʊr'fɔːˌʃɒk]  英['fɔːʃɒk]
n.  前震

英英释义

Noun
  1. a tremor preceding an earthquake

例句

用作名词(n.)
  1. An increase in foreshock activity triggered the evacuation warning.前震活动的增加引发了疏散警报。
  2. In the Pacific Northwest, there is no evidence of foreshock activity for most historic earthquakes.在太平洋西北地区,历史上的大多数地震都没有前震活动的证据。
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