Question

THERE IS A CATCH是什么意思？

是不是等同于every coin has its two sides.

Answer 1

There is a catch = 内有玄机。
例如：他不会白白的帮你，小心内有玄机（He won't help you for nothing. There is a catch.）

Every coin has its two sides = 凡事都有其利与弊。与 there is a catch 意思不同。

Answer 2

every coin has its two sides意思是任何事物都有两面性。
THERE IS A CATCH意思是：有一个catch

Answer 3

There is a catch
网络释义
There is a catch:棘手的问题

Every coin has its two
网络释义
Every coin has its two:有利有弊