mouse 的复数是mice。

mouse

n. 鼠标；老鼠；胆小羞怯的人

vt. 探出

vi. 捕鼠；窥探

A cat often plays with a mouse before the kill.

猫在咬死老鼠之前常常要耍弄它一番。

You can check your e-mail with a click of your mouse.

通过鼠标的一点你就能查电子邮件。

Our cat is hopeless at catching mice.

我们的猫绝对捉不到老鼠。