必要的

• It seemed that the delegates knew they were going through necessary motions .
  代表们似乎认识到，他们不过是在做出一些必要的姿态。
• Hard work is essential. but there's also a time for rest and relaxation .
  勤奋工作当然是必要的，但是每人也必须有时间休息和娱乐。
• It was a point of politeness to walk towards the landing-place in order to receive them .
  从礼貌方面说，走到码头去迎接她们是必要的。
• If it happened, obviously you have to exercise judgment and do what was needed .
  真出现那种情况，当然得由你作出判断，采取必要的措施。
• "the prof's" lucid explanations of science give him the essential facts he needs .
  但“这位教授”深入浅出的讲解使他获得了必要的科学知识。
• Turning now to seedbeds, it is absolutely essential to create a really fine bed .
  再谈谈播种种床的问题，建立一个真正优良的种床是完全必要的。
• Do not blame him, for departing from his character where the deviation is necessary .
  不要因为他在必要的时候做出背离他性格的行为而责备他吧。
• It was up to the south vietnamese-and the united states-to take the steps necessary to defeat it .
  要挫败它全得靠南越和美国去采取必要的措施。
• In those days it was very necessary to be surrounded by trustworthy men like treville .
  那时，像特雷维尔这样可信赖的人在身边护卫是十分必要的。
• In certain case it might be necessary to further decompose a spiral into convex subsets .
  在某些情况下，把一个螺旋形进一步分解成凸子集是必要的。