必要的

• It was necessary to satisfy stringent criteria to justify its use .
  使用苛刻的标准来评价其实用性是完全必要的。
• Sutures are foreign bodies but a necessary adjunct in surgery .
  缝线是一种异物，但是一种在手术中必要的附属品。
• Please leave a space between the lines for the necessary corrections .
  在行与行之间要留出间隙，以便作必要的修改。
• It is necessary to distinguish between the temperature of a body and its heat .
  将物体的温度和热量区分开是必要的。
• It is essentially necessary that i should have an answer to this question .
  我对这个问题要一个答复，这是非常必要的。
• The necessary population inversion can be achieved in a variety of ways .
  我们可以用各种方法来实现这种必要的粒子数反转。
• I understand that it is absolutely necessary to the character in perfection .
  我认为那对培养一个完美无缺的人物是绝对必要的。
• I have all the evidence necessary to convict this young criminal now .
  我掌握一切必要的证据，现在就能判定这个年轻犯人的罪名。
• I should like to hear from you that you would understand the necessity for such a step .
  我希望得知你会理解这是一个必要的步骤。