mouse含有“老鼠、鼠標”等意思；而rat含有“老鼠、背叛、欺騙”等意思。mouse只能作名詞使用；而rat既可以作名詞使用，又可以作動詞使用。當mouse的意思為“老鼠”時，其指代的是家鼠或小白鼠，該品種的老鼠，體型較小；當rat的意思為“老鼠”時，其指代的是大老鼠，該品種的老鼠，體型較大。

mouse的例句

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

用鼠標將圖標拖到一個新的位置。

Click the left mouse button twice to highlight the program.

雙擊鼠標左鍵來加亮突出這個程序。

He was a weak little mouse of a man.

他是個懦弱無能的人。

A cat often plays with a mouse before the kill.

貓在咬死老鼠之前常常要耍弄它一番。

I held the mouse by its tail.

我抓著耗子的尾巴倒提起來。

rat的例句

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

這些老鼠已經過訓練，想吃食物時就會按鈴。

Rats had gnawed through the cable.

老鼠把電纜咬斷了。

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

在我的老家，誰都不出賣朋友。

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

人們認為我養只耗子當寵物是變態。

The rats were controlled by poisoning.

用毒殺法使老鼠受到控制。