aftershock
n. 余震
余波
复数 aftershocks
例句
They were already under stress, thanks to the aftershock of last year's drought.
去年干旱的余波已经给他们造成压力了。
《柯林斯英汉双解大词典》
What is an aftershock?
余震是什么?
The largest so far was a 6.9 magnitude aftershock.
到目前为止的最大余震为6.9级。