| 词汇 | when-hell-freezes-over |
| 释义 | when hell freezes overidiom informal If you say that something will happen when hell freezes over, you mean that it will never happen.根本不可能（发生） Always & never again all alongidiom all-time along always ever fail hell in all my (born) daysidiom in/through all the yearsidiom invariably kingdom month on demandidiom perpetual perpetually till/until kingdom comeidiom till/until the cows come homeidiom whenever world |
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