N any return made to a ball that has touched the ground, as opposed to a volley 击落地球 [tennis]
Eventually a negative stepped leader travels downward and reaches the ground, creating a return stroke.
最终一个下行传播的负极梯形先导接触到地面，制造了一次回击。
There is a return stroke after the lightning hits the ground.
在闪电击向地面以后出现了一次回击。
The competitor again lifted the ball, placed it where it first struck the ground when re-dropped and played his next stroke.
比赛者再次捡起球，把它放到重新抛球时球首先击打到地面的地方，并打了下一杆。
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