So, because they have short forelimbs and long hindlimbs, they can jump easily, quickly and for long distances.

正是因为袋鼠前肢很短而后肢又很长，所以它们才能跳得又快又远。

youdao

Electrons, like that imaginary tennis ball, can simply jump (or tunnel) from one place to another, and molecules can attract each other at moderate distances.

ECONOMIST: Small wonders