To be on ice 的意思是暂缓、搁置某个决定或计划。换句话说就是暂时先不考虑某件事了。

例句

I've had to put my trip to the Caribbean on ice as I need the money to get my car repaired.

All development projects are on ice until we receive more funding.

请注意

另一个非常相似的短语 to be on thin ice 的意思是如履薄冰，处境困难。

例句

John opened a luxury goods shop in 2008. He was on thin ice when the recession started.