Please translate the sentence below

问题描述:

Please translate the sentence below
They launched themselves by jumping from cliffs,and dropping from trees.

他们发射他们自己通过从悬崖上跳下来,后来掉在树上又落下来.
前半句,他们从悬崖上掉下来,这样就可以了我开始是字面翻译的