vain

• All attempts have been in vain .
  所有的尝试都是徒劳的。
• He loved mary but sued in vain .
  他爱玛丽，但求婚失败。
• Their blood was not shed in vain .
  他们的血没有白流。
• All the best plays were run over in vain .
  所有的优秀剧本都考虑过了，没有一本中意。
• The fact that he had begotten a child made him vain .
  想起自己也生过孩子，他得意了。
• Their hopes were but vain .
  他们的希望只不过是妄想。
• All our work was in vain .
  我们的工作全都白干了。
• We used the most modern search methods in vain .
  我们使用了最现代的探索方法也未能如愿。
• My efforts were not in vain .
  我的气力没有白费。
• It was a vain effort .
  这种努力是徒劳无益的。