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1·She claims he ratted on their divorce settlement.

她声称他违背了他们的离婚协议。《柯林斯英汉双解大词典》

2·They have ratted on us.

他们背叛了我们。

3·We haven't ratted on our friends.

我们没有出卖朋友。

4·My brother ratted on me to my mother.

我弟弟向我妈打我的小报告。

5·That coward ratted on his fellow - workers.

那个胆小鬼告发了和他一起干活的工人。

6·You ratted on us.

你做奸细告发了我们。

7·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。

8·He ratted out on Sophia when she was 7 months pregnant.

他在索菲娅怀孕七个月时将她抛弃。

9·Tim Jones saw us smoking and ratted on us to the teacher.

蒂姆·琼斯看见我们在抽烟就去老师那里告发了我们。

10·They said they'd help but they've ratted on their friends.

他们说他们会帮忙的，但他们却背叛了朋友。

(1)smell a rat感到不妙；感到有可疑之处

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

(1)like a drowned rat浑身湿透（象落汤鸡）

(1)rat poison杀鼠剂，老鼠药；鼠毒

(1)pack rat不可靠的人，有敛癖的人

(1)white rat白鼠