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“The surprising thing to me is that you need very little mechanical disturbance to trigger an earthquake,” says Seeber. “毫無(wú)疑問(wèn)，地震都是有誘因的”，紐約拉蒙多特利地球觀測(cè)中心的地質(zhì)學(xué)家萊昂賽博說(shuō)。