flea

The dog had to wear a special collar to kill the fleas hiding in its fur.

(Chinese) 这只狗必须佩戴特制的颈圈来杀死藏在皮毛里的跳蚤。

A single flea can jump over a hundred times its own body length.

(Chinese) 一只跳蚤能跳过超过其自身体长一百倍的高度。