[C] a piece of work (that must be) done, especially if hard 任务；作业 ) need or make necessary 需要 the knowledge of computers. 新的工作需要我具备电脑知识。
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If you need to add or remove entries in DNT properties files after you review the DNT strings, you can make necessary changes directly in the DNT properties files.
在检查dnt字符串后，如果需要在dnt属性文件中添加或删除条目，可以直接在dnt属性文件中做出必要的更改。
If you make your book longer or shorter, you'll need to make sure you have the proper length screws - a tight fit is necessary.
如果您使您的图书较长或较短的，您需要确保您具有适当长度的螺丝钉-过盈配合是必要的。
Where Chinese vessels have need to make fast to alien vessels, captains or their agents shall apply to the frontier inspection station for going through necessary formalities.
第二十条） 中国船舶需要搭靠外国船舶的，应当由船长或者其代理人向边防检查站申请办理搭靠手续；
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