when hell freezes over

常見(jiàn)例句

The only way to get rid of him short of a shotgun is to agree to meet up soon. Preferably, when hell freezes over.
擺脫他的最好辦法是說(shuō)我先失陪過(guò)會(huì)再過(guò)來(lái)，儅然，等到地獄的冰化了再說(shuō)吧。

And they say it will be when hell freezes over that they will accept anything remotely like a stimulus bill or any kind of a proposal you have out there to stimulate job growth through spending.
WHITEHOUSE: Presidential Press Conference
Besides, the state's would-be budget-balancers have tried almost everything else they can think of—short of imposing a personal income tax, which may come when hell, or at any rate Houston, freezes over.
ECONOMIST: Or, when is a new tax not a new tax?