評論
打印
once in a blue moon
極為罕見
A:The river is much higher than the ground.
A:河比地高得多。
B:How dangerous!
B:多危險呀!
A:Yes, it is.
A:是呀。
B:What if the river overflowed its bank?
B:河水要是漲過了岸，怎么辦?
A:That would be disastrous.
A:那可遭殃了。
B:The whole city will get flooded?
B：整個城市就會被水淹了?
A:Of course. But that happens only once in a blue moon.
A:就是，不過那百年也不見得會遇上一次。
