fail to

• I fail to understand the reason .
  我不了解那个理由。
• He failed to establish his charge .
  他的控告不成立。
• I have failed to reach them by postal inquiries ..
  我未能通过邮政查询与他们取得联系。
• He never fails to come on sunday .
  他星期天准来。
• When a business fails to make profits it should die .
  如果一家公司没有赚钱，它就该垮台。
• I fail to follow the logic .
  我不理解这种逻辑。
• She failed to measure the effect of her actions on her family .
  她未虑及其行为对家庭的影响。
• Do n't fail to write me .
  不要忘了给我写信。
• We too often fail to apply basic ecological principles .
  我们都太不注意运用基本的生态学原则。
• The police car sped away, but failed to locate georgos .
  警车飞驶而去，但未能找着乔戈斯的下落。