mouse含有“老鼠、鼠标”等意思；而rat含有“老鼠、背叛、欺骗”等意思。mouse只能作名词使用；而rat既可以作名词使用，又可以作动词使用。当mouse的意思为“老鼠”时，其指代的是家鼠或小白鼠，该品种的老鼠，体型较小；当rat的意思为“老鼠”时，其指代的是大老鼠，该品种的老鼠，体型较大。

mouse的例句

Use the mouse to drag the icon to a new position.

用鼠标将图标拖到一个新的位置。

Click the left mouse button twice to highlight the program.

双击鼠标左键来加亮突出这个程序。

He was a weak little mouse of a man.

他是个懦弱无能的人。

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。

I held the mouse by its tail.

我抓着耗子的尾巴倒提起来。

rat的例句

The rats had been conditioned to ring a bell when they wanted food.

这些老鼠已经过训练，想吃食物时就会按铃。

Rats had gnawed through the cable.

老鼠把电缆咬断了。

Where I come from, you don't rat on your friends.

在我的老家，谁都不出卖朋友。

People think I'm sick for having a rat as a pet.

人们认为我养只耗子当宠物是变态。

The rats were controlled by poisoning.

用毒杀法使老鼠受到控制。