it is necessary that是什么意思
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it is necessary that的意思是“这是必要的”
例句
1.So it is necessary that we research the theory and method for uncertain system.
由此可见，对不确定性系统的理论与方法的研究是必要的。
2.It is necessary that an efficient worker ( should) accomplish his work on time.
按时完成工作任务是下人工作效率高的工人必须做到的。
3.Unless it is necessary that you run a particular service, you should disable it.
除非必须运行特殊的服务，否则应当禁用该服务。
4.It is necessary that the problem ( should) be discussed at once.
立刻讨论这个问题很有必要。
5.It is necessary that a high school student should master a foreign language.
高中学生掌握一门外语很有必要。
例句
1.So it is necessary that we research the theory and method for uncertain system.
由此可见，对不确定性系统的理论与方法的研究是必要的。
2.It is necessary that an efficient worker ( should) accomplish his work on time.
按时完成工作任务是下人工作效率高的工人必须做到的。
3.Unless it is necessary that you run a particular service, you should disable it.
除非必须运行特殊的服务，否则应当禁用该服务。
4.It is necessary that the problem ( should) be discussed at once.
立刻讨论这个问题很有必要。
5.It is necessary that a high school student should master a foreign language.
高中学生掌握一门外语很有必要。
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