水蛭是一种会附着在皮肤上吸血的生物。

Leeches are ___blood-sucking creatures that attach to the skin.

那些放高利贷的人简直就是吸血鬼，榨干了穷人的血汗钱。

Those loan sharks are nothing but ___blood-sucking leeches, draining the poor dry.

这份血汗工厂的工作简直让人精疲力竭。

This ___blood-sucking sweatshop job leaves me completely drained.