leech

水蛭、蚂蟥

A leech attached itself to my ankle while we waded across the stream.

我们涉水过溪时，一只水蛭吸附在我的脚踝上。

寄血虫、寄生虫、吸血鬼贬义

He's a leech who has never paid rent in his life.

他就是个寄生虫，一辈子没付过房租。

依附、榨取、占便宜贬义

She's tired of relatives leeching money from her every month.

她厌倦了亲戚每个月向她榨取金钱。

依赖、白吃白住、占便宜口语

He has been leeching off his parents since he graduated.

他毕业后就一直靠父母养。