come to naught; crumble to dust; go up in smoke; nothing left; vanish

1. 和談失敗後，迅速結(jié)束戰(zhàn)爭的希望都已化為烏有。
   With the failure of the peace talks all hopes of a swift end to the war have flown out of the window.
2. 她對這個建議的抵觸情緒已化為烏有了。
   Her resistance to the proposal has crumpled.
3. 他的希望化為烏有。
   His hope was reduced to zero.
4. 大火燒毀了他正在建的房子，他的一切成績化為烏有。
   All his work came to naught when the fire destroyed the house he was building.

化為的英語翻譯：

烏有的英語翻譯：