副詞 vainly:

1. to no avail
   同義詞：in vain

1. He vainly tried to mark the defacing stain out.
   他試圖除去有損外觀的污跡，但沒有成功。
2. Before they fled the country, the enemy vainly attempted to destroy all the factories.
   敵人在逃往國(guó)外前，妄圖把所有工廠都?xì)У簟?/div>
3. Taking just a little money with her, she wanders about the Midland moors, vainly seeking employment.
   她身上僅帶了少許的錢，在英格蘭中部荒原上四處漂泊徒勞地求職。