I dunno what those are, yeah they might be little sand fleas or something.

我不知道那些是啥，是的 它们可能是一些小沙蚤之类的。

Many animals jump, from sand fleas to grass hoppers to kangaroos and they launch their bodies into the air with a single stroke of their muscles.

许多动物都会跳跃，从沙蚤到草蜢再到袋鼠，它们只需轻轻一击肌肉，就能将身体抛向空中。