n.垮台；暴雨；衰落的原因
A downfall is expected, so take an umbrella. 估计要下大雨,把伞带上。
Pride was his downfall. 骄傲是他垮台的原因。
He is not a snob and therein lay his downfall. 他不是个势利小人，而他失败的原因正在于此。
