secular movement
... secular movement 地壳缓慢升降运动 secular rise 长期上升 secular sinking 长期下沉 ...
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最后作者论述了区内地壳运动特征，认为近期地壳运动仅有缓慢升降活动，属相对稳定状态时期。
At last the author discussed activity character of region crust, and concluded it is a stabilization period for crust only moves slowly up and down.
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