rat

mouse, rat

名词 rat:

1. any of various long-tailed rodents similar to but larger than a mouse
2. someone who works (or provides workers) during a strike
   同义词：scab, strikebreaker, blackleg
3. a person who is deemed to be despicable or contemptible
   同义词：rotter, dirty dog, skunk, stinker, stinkpot, bum, puke, crumb, lowlife, scum bag, so-and-so, git
4. one who reveals confidential information in return for money
   同义词：informer, betrayer, squealer, blabber
5. a pad (usually made of hair) worn as part of a woman's coiffure

动词 rat:

1. desert one's party or group of friends, for example, for one's personal advantage
2. employ scabs or strike breakers in
3. take the place of work of someone on strike
   同义词：fink, scab, blackleg
4. give (hair) the appearance of being fuller by using a rat
5. catch rats, especially with dogs
6. give away information about somebody
   同义词：denounce, tell on, betray, give away, grass, shit, shop, snitch, stag

1. The rat gnawed a hole through the wall.
   耗子在墙上啃了一个洞。
2. The dog was worrying a rat.
   那条狗撕咬著一只老鼠。
3. The dog scented a rat.
   那狗嗅出有老鼠的气味。
4. The dog nosed out a rat.
   那只狗闻到了老鼠的气味。
5. They said they'd help but they've ratted on us.
   他们说要帮助我们，可是他们食言了。
6. 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！

rat

n.（名词）

Any of various long-tailed rodents resembling mice but larger, especially one of the genusRattus.
鼠，家鼠：似鼠但比鼠大的长尾巴啮齿动物中的任意一种，特别是属于家鼠 属的动物
Any of various animals similar to one of these long-tailed rodents.
似鼠动物：长尾巴且似鼠的啮齿目动物
Informal A despicable, sneaky person, especially one who betrays or informs upon associates.
【非正式用语】 鼠辈，卑鄙小人：令人生厌，狡猾的人物，特别是出卖或告发同伴的人
A pad of material, typically hair, worn as part of a woman`s coiffure to puff out her own hair.
女用发垫：一团垫状物，通常由头发组成，戴在女人头上作为头饰来达到蓬松的效果
v.intr.（不及物动词）
rat.ted,rat.ting,rats
To hunt for or catch rats, especially with the aid of dogs.
捕鼠：寻找或猎捕老鼠，特指用狗猎捕
Slang To desert or betray one`s comrades by giving information:
【俚语】 出卖：告地情报抛弃或背叛同志：
例句：
ratted on his best friend to the police.
把他最好的朋友出卖给警察

来源：
Middle English
中古英语
from Old English rôt
源自 古英语 rôt