rat

The hungry rat managed to get into the kitchen and was eating the spilled cereal on the floor.

(Chinese) 那只饥饿的老鼠钻进了厨房，正在吃地板上洒出的麦片。

Certain types of laboratory rats are bred specifically for scientific medical research.

(Chinese) 某些实验室老鼠是专门为科学医学研究而培育的。