In the past 300 years, no earthquake nearly that large — nothing larger than magnitude-eight — had struck in the Japan subduction zone.
在过去的300年里，在日本俯冲地区，从没发生过一个如此巨大的地震-没有一次比八级还大。
Soon after the magnitude-7.9 Wenchuan earthquake struck lastMay, geologist Fan Xiao asked: Could a large dam near the faulthave triggered the devastating quake?
去年五月7.9级汶川地震发生后不久，地质学家范晓就发问道：是位于断层附近的大坝诱发了这次灾难性的大地震吗？
In particular, for very large earthquakes moment magnitude gives the most reliable estimate of earthquake size.
尤其是对于特别重大的地震，“矩震级”能够确定出最为可信的地震规模。
In particular, for very large earthquakes moment magnitude gives the most reliable estimate of earthquake size.
尤其是对于特别重大的地震，“矩震级”能够确定出最为可信的地震规模。
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