rat

复数：rats过去式：ratted过去分词：ratted现在分词：ratting第三人称单数：rats

1. [C]大老鼠 a long-tailed animal related to but larger than the mouse
2. [C]卑鄙小人,叛徒 a worthless disloyal person

1. vi. 捕鼠 hunt rat
2. vi. 变节; 食言; 叛变 break an agreement, a promise, etc.; fail to do sth one has undertaken to do; betray sb

• catch a rat捕鼠
• get rid of rats消灭老鼠
• smell a rat怀疑其中有诈

• brown rat棕色鼠
• dirty rat卑鄙的人

• the water rat水鼠

• like a rat in a hole像瓮中之鳖,很有把握
• like a drowned rat(淋得)像落汤鸡,浑身湿透

• rat on密告…
• rat on one's friends背叛朋友

smell a rat感到不妙；感到有可疑之处

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

like a drowned rat浑身湿透（象落汤鸡）

rat poison杀鼠剂，老鼠药；鼠毒

pack rat不可靠的人，有敛癖的人

white rat白鼠

mole rat[动]鼹形鼠

mall rat逛商厦迷；爱逛商店的年轻人

water rat河鼠；（美）麝香鼠（等于muskrat）；[俚]岸滨小偷

rat on撤销；背叛，告发

1. He was regarded as a rat.
   大家叫他变节者/叛徒。
2. The dog was worrying a rat.
   那条狗撕咬著一只老鼠。
3. The dog nosed out a rat.
   那只狗闻到了老鼠的气味。
4. Now I can see why people say he is such a rat.
   现在我知道了为什么人们说他是卑鄙小人了。
5. But you promised to help us, you rat!
   可是你答应过要帮我们的忙，你这言而无信的小人！

1. The little boy likes to rat.
   这个小男孩喜欢捕鼠。
2. They said they'd help but they have rat on their friend.
   他们说他们会帮忙的，但他们却背叛了朋友。
3. Why did he rat out on his friends?
   他为什么背弃了朋友们呢?
4. We should not rat on our promises.
   我们不应违背诺言。