vainly [ˈvenlɪ]

例句:

• The convulsive sobs which the girl vainly tried to repress.
  来自T. Collins
• He hunted vainly through his pockets for a piece of paper.
  他翻遍口袋想找一张纸，结果没找到。
  
• The criminals vainly sought concealment from the searchlight.
  罪犯们徒劳地躲闪着探照灯光。
  
• He shouted after them, vainly trying to attract their attention.
  他在他们的后面高喊，想引起他们的注意，却是徒劳。
  
• Charlotte vainly endeavoured to hide her confusion.
  来自T. Hardy
• Writers yelp vainly when directors muscle in on their screen credits.
  来自Publishers Weekly