1.There’s no sense in taking unnecessary risks.

1.做必要的冒险毫无意义。

2.Don't labour the reader with unnecessary detail.

2.要用必要的细节使读者疲倦。

3.This renders it unnecessary for me to do anything.

3.这使无需做任何事情。

4.I cancelled many unnecessary words in my manuscript.

4.原稿 许多需要的字删去了。

5.He cancelled many unnecessary words in his manuscript.

5.他原稿上许多多余的词删掉。

6.All those clothes are unnecessary on such a hot day.

6.在这样个大热天，所有那些衣服都需要了。

7.In writing this report I have omitted all unnecessary details.

7.在写这份报告时, 必要的细节全都删除了。

8.We shall have to trim away the unnecessary parts of the spending.

8.们必须削减必要的开支。

9.Don't involve yourself in unnecessary dispute.

9.要自己卷入无谓的争论中。

10.I know all these locks seem unnecessary but I believe it’s always better to play safe.

10.知道上这么多锁似乎没有必要，相信谨慎点总没坏处。

11.Animal rights campaigners have a point when they say that a lot of animal testing is unnecessary.

11.参加保护动物权利运动的人认为许多动物实验是必要的，这很有道理。

12."Housewives can visit shopping centres on foot for in these specially designed living areas, cars are unnecessary."

12."家庭主妇可以步行去商业中心,因为在这些特别设计的生活区小汽车是需要的。"

13.While the inclination to procrastinate is common , one must fully consider the detrimental impact of unnecessary delays.

13.虽然拖延的倾向是普遍的，但是人们应该充分考虑到必要的延误造成的有害影响。

14.It is the misunderstanding and misdoing of the philosophy to make the medical philosophy become unnecessary with the medicine.

14.使哲学成为医学多余是那种对哲学的错误理解和做法。

15.The diagnosis of occult fracture, which is always be maldiagnosed, even leads to unnecessary medical dispute, is one of difficulties in clinical osteological surgery.

15.摘要隐匿性骨折的诊断是当前临床骨外科诊疗程中的难点之，很容易造成漏诊、误诊，引起些必要的医疗纠纷。

16.Leonicus raised a hand to signal the zemstvo was now in session, but it was essentially an unnecessary gesture. All eyes were upon him, awaiting his words.

16.狮子做了个手势，示意会议开始：实际上这纯属多此举。所有的目光都在注视他，等着他开口讲话。

17.It seems unnecessary to have watchmen like me on the Wall in the future when people along the Wall know better than to further vandalize the rampart.

17.，照现在的形势来看，觉得将来最好是再需要设们这样的长城保护员了，那就说明长城沿线的人们保护长城的意识已经到了相当高的境界了，人为破坏长城的现象再也没有了。