鼠

狗追猫，猫追鼠。

狗追貓，貓追鼠。

A dog runs after a cat, and the cat after a mouse.

十二生肖是由十一種源於自然界的動物即鼠、牛、虎、兔、蛇、馬、羊、猴、雞、狗、豬以及傳說中的龍組成的，用於紀年。

The twelve animals of the Chinese zodiac come from eleven kinds of animals originating in nature, namely the rat, ox, tiger, rabbit, snake, horse, goat, monkey, rooster, dog and pig, as well as the legendary form of the dragon, and are used as a calendar.

窮鼠囓狸。

A cornered rat will bite a cat.

鼠類也有用處。它們能幫著清潔管道。

Rats also have a function. They help to clean the pipes.

要不要買個無線鼠標呢？

Should I buy a wireless mouse?