Geologists believe that the warning signs for a major earthquake may include sudden fluctuations in local seismic activity, tilting, and other deformations of the Earth's crust, changes in measurements of the strain across a fault zone, and variations among the electrical properties of underground rocks.
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kiki 2014-10-22 20:46:29
sudden fluctuations in..., changes in ..., and variations in ...
香蕉小姐 2015-05-25 22:11:49
'changes in measurement are a warning sign'是illogically的，应该是changes in the strain are a warning sign。
Jessicajy 2015-06-21 13:23:04
提炼平行结构：fluctuations in, changes in, and variations in changes in measurement are a warning sign'是illogically的，应该是changes in the strain are a warning sign
