這條河比地還高。
B: How dangerous!
太危險了!
A: Yes, it is.
是的,很危險。
B: What if the river overflowed it’s bank?
如果河水溢上岸了怎么辦?
A: That would be disastrous.
那將會是災難。
B: The whole city will get flooded?
整個城市將被水淹。
A: Of course. But that happens only once in a blue moon.
當然,不過那幾百年也不見得會遇上一次。