rat

鼠；卑鄙小人，叛徒英释中释nan animal that looks like a large mouse with a long tail

捕鼠；背叛，告密英释中释vif someone rats on you, they tell someone in authority about something wrong that you have done

1 smell a rat,感到不妙；感到有可疑之处

2 rat race,n. [俚]激烈竞争（商业上）；无意义的竞争；[电]环形导波管

3 like a drowned rat,浑身湿透（象落汤鸡）

4 rat poison,杀鼠剂，老鼠药；鼠毒

5 pack rat,不可靠的人，有敛癖的人

6 white rat,白鼠

7 mole rat,[动]鼹形鼠

8 mall rat,逛商厦迷；爱逛商店的年轻人

9 water rat,河鼠；（美）麝香鼠（等于muskrat）；[俚]岸滨小偷

10 rat on,撤销；背叛，告发

1 But you promised to help us, you rat!.可你答应过要帮我们的，你这小人！