不一定

• A zero rate of inflation is neither a realistic goal nor necessarily desirable .
  通货膨胀率为零，既不是现实的目标也不一定需要。
• Although quinine often relieves symptoms, it does not necessarily cure the disease .
  虽然奎宁能减缓病症，但不一定能根治这种病。
• The phase rule still holds when every species does not appear in every phase .
  当每个物种不一定都出现在各相中时，此相律仍然成立。
• While objective setting should start at the top, it is not essential that it do so .
  尽管目标应当从上层开始建立，但也不一定这样做。
• You 'd better reckon without me , as i am not sure whether i shall be able to be present .
  你最好别把我算进去，因为我能否出席还不一定。
• In other words, language is not necessarily the private property of those who use it .
  也就是说：语言不一定是讲这一语言的人的私有财产。
• When we are happy, we are always good, but when we are good, we are not always happy .
  我们高兴的时候总是很善良，可善良的时候不一定高兴。
• In the fully plastic condition, the neutral axis does not necessarily pass through the centroid .
  在全塑状态下，中性轴不一定需要通过形心。
• It may describe a person who has been known for a long time but is not necessarily old in years .
  它也可用以指早已认识的人，但不一定年老。
• These books, while informative, are not necessarily truthful by our standards .
  这些书虽然资料丰富，按照我们的标准来看，却不一定是忠实可信的。