我英文不好，想请教ELEPHANT &PIGGIE book里的一本Are you ready to play outside?里有一句不知道什么意思。就是小象和小猪在雨里玩得正开心，小猪说I hope it rains all day!，突然雨停了，有一句:Rsts.这个是什么意思？
另外请教有没有翻译句子翻得好的网站工具推荐啊。多谢多谢。
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.
2 N-COUNT disapproval
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. (INFORMAL)
What did you do with the gun you took from that little rat Turner?
3 VERB V on n
If someone rats on you, they tell someone in authority about things that you have done, especially bad things. (INFORMAL)
They were accused of encouraging children to rat on their parents.
4 VERB V on n
If someone rats on an agreement, they do not do what they said they would do. (INFORMAL)
She claims he ratted on their divorce settlement.
5 PHRASE V inflects
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...
