cat out of the bag

基本解释

Their engagement was to be a secret but the ring on her finger let the cat out of the bag.
他们俩订婚原本想保密的，可是她手指上的戒指却把这个秘密泄露出来了。
I will give my mother a surprise on her birthday, but my father let the cat out of the bag.
我本来想在妈妈过生日的时候给她一个惊喜，没想到爸爸却泄露了秘密。
Letting the cat out of the bag is supposed to stem from a trick played in old markets where buyers were duped when they thought they were buying a suckling pig.
一般认为，“把猫从袋子里放出来”的说法源自古代集市上的一个把戏：有时，商贩会欺骗买家，在他们购买乳猪的袋子里装一只猫。

Just be careful not to let the cat out of the bag, or someone may leave you holding the bag.
If you tell about something that was supposed to be a secret, we say you let the cat out of the bag.
The phrase to be left holding the bag is as widely used as the expression to let the cat out of the bag.

Construction and Housing Minister Ariel Attias let the cat out of the bag.
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