有必要

• "it ought to be all over by now," he said, "i wonder if i need stay up. "
  “现在应该一切都过去了，”他说，“不知道我是不是有必要整晚不睡。
• I know it was necessary to punish the child, but nevertheless it left a nasty taste in my mouth .
  我明知有必要惩罚这个孩子，可是我仍然感到懊悔。
• It is necessary for us to distinguish carefully between the temperature of a body and its heat .
  我们有必要仔细地把物体的温度跟它的热量区别开来。
• In order to generalize relativity, it is necessary to think about observations in noninertial .
  为了推广相对论，有必要考虑在非惯性参照系中的观测。
• It is necessary to elaborate on the definition of a fatigue coefficient such as that for ductility .
  有必要对疲劳系数，如延性系数的定义作详细讨论。
• As we move toward the twenty-first century surely there is the need to dream up new institutions .
  我们在向二十一世纪前进，确实有必要构想新的制度。
• With the government 's failure to solve the problem of unemployment , a fresh approach is indicated .
  鉴于政府未能处理好失业问题，有必要采取新的措施。
• The next early morning, he was under the necessity of making his report to the sitting magistrate of the day .
  第二天清晨，他有必要向值班市政官提出报告。
• It is necessary to make large extrapolation in order to draw boundaries around a few small outcrops .
  为了画出一些小块露头周围的界线，有必要进行大量的外推。
• The need she felt to disburden her mind to tito urged her to repress the rising anguish .
  她感觉有必要向蒂托吐露自己的心事了，这促使他压下了涌上心头的苦恼。