be useful to

• It may still be useful to press the point home by working out a particular illustration .
  通过一种特殊的说明来表明这点也许仍是有用的。
• To calculate the aging of the twin, it is useful to introduce the concept of proper time .
  为了推算孪生子的衰老，引入原时概念是有用的。
• Before going further, it may be useful to get some perspective on the national debt .
  在作进一步讨论前，先观察一下国内负债情况可能是有用的。
• To discuss this wave aspect, it is useful to invoke a form of the correspondence principle .
  为讨论这个波动性质，利用对应原理的一种形式是有好处的。
• Plants provide many chemicals that can be useful to humans, especially for drugs and insecticides .
  植物能为人类提供有用的化学物质，特别是药物和杀虫剂。
• When the library's own stock has been covered, it is useful to give the reader an interim report .
  当图书馆本身藏书全查过时，给读者一个临时性的报告是有益的。
• It is useful to introduce a shorthand notation to facilitate the identification of various isotopes .
  为了便于区别各种不同的同位素，引进简化的符号是很有用的。
• Managers also encounter situations in which it is useful to test for the equality of more than two population means .
  管理人员还会遇到需要检验两个以上的总体平均数是否等同的问题。
• If you can just step up to our house tonight, jem, i'll put up a few things as may be useful to mary .
  要是你今天晚上能上我们家来一次，杰姆，我要找几样对玛丽有用的东西请你带给她。
• It will be useful to deal briefly with the successful methods first, so as to reveal to the reader my own bias .
  首先简单地谈一谈那些成功的方法，以便向读者表明我自己的倾向，是有好处的。