rats
A rat is an animal which has a long tail and looks like a large mouse.
This was demonstrated in a laboratory experiment with rats.
这点通过在实验室中用老鼠做试验得到证明。
If you call someone a rat, you mean that you are angry with them or dislike them, often because they have cheated you or betrayed you.
What did you do with the gun you took from that little rat Turner?
你要用从特纳那个卑鄙小人那里弄来的那支枪干什么呢?
smell a rat
If you smell a rat, you begin to suspect or realize that something is wrong in a particular situation, for example that someone is trying to deceive you or harm you.
If I don't send a picture, he will smell a rat.
如果我不寄张照片,他会起疑心。
rats , ratting , ratted
If someone rats on you, they tell someone in authority about things that you have done, especially bad things.
They were accused of encouraging children to rat on their parents.
他们被指控怂恿孩子们告发他们的父母。
If someone rats on an agreement, they do not do what they said they would do.
She claims he ratted on their divorce settlement.
她声称他违背了他们的离婚协议。