n.垮臺；暴雨；衰落的原因
A downfall is expected, so take an umbrella. 估計(jì)要下大雨,把傘帶上。
Pride was his downfall. 驕傲是他垮臺的原因。
He is not a snob and therein lay his downfall. 他不是個(gè)勢利小人，而他失敗的原因正在于此。
