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。

youdao

youdao

In today's global markets, greater profits may be turned into investment capital that could easily be reinvested in old-style eco-inefficient industries.

在当今的全球市场中，更大的利润可能会转化为投资资本，从而可以轻易地再投资于老式的生态效率低下的行业。

youdao

"There are many new markets for the Thai rice and also we still have for our old customer China,some Arab countries they will increase the demand."

VOA: standard.2009.12.17

All he did was work in the souks, the old markets of Aleppo, waiting in vain for the tourists to come back.

CNN: In Syria, searching for loved one taken away

Experience suggests that export revivals are led by highly productive industries that already export a lot, rather than less productive industries regaining old markets.

ECONOMIST: Export or die

Dell and HP keep investing cash into trying to find past glory in old markets, but customers shifting to new markets causes that money to be wasted.

FORBES: Avoid "Value Traps" - Sell Dell, HP