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。
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。
Though a tree grow ever so high, the falling leaves return to the ground.
树高千尺，落叶归根。
They utilize the natural draining ability of soil to return water to the ground.
他们利用土壤的自然排水能力回水到地面。
Rainstorm design return period of one year, the ground water catchment time for 10 minutes.
暴雨设计重现期为一年，地面集水时间为10分钟。
Rainstorm design return period of one year, the ground water catchment time for 10 minutes.
暴雨设计重现期为一年，地面集水时间为10分钟。
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