I think at the beginning of each book a brief introduction to it is necessary.
我认为每本书开头的简短介绍都是很有必要的。
Sometimes it is necessary to say no.
有时候说“不”是必要的。
Do you think it is necessary for Sunny to give tips for the service?
你认为桑妮有必要为服务给小费吗？
It is necessary to do further study and development on the pine cone.
有必要对松果进行进一步的研究和开发。
It is necessary for us to control our desires in this consumer society.
在当今这个消费者主导的社会中，我们很有必要控制自己的欲望。
It is necessary for the prince to know well how to use the beast and the man.
王子懂得如何使用兽和人是很必要的。
In order to master grammar knowledge, it is necessary to practice as much as possible.
为了掌握语法知识，尽可能多做练习是有必要的。
It is necessary to "cut one's teeth" on the non-glamorous parts of a field.
在一个领域中尝试做一些不那么光彩照人的工作来获得经验是有必要的。
A: If you think it is necessary.
A：如果你认为有这必要的话。
It is necessary to make the right decision.
做，这对做出正确的决定是很必要的。
那是必须的。
It is necessary to do outside activities.
从事课外活动是很有必要的。
But sometimes it is necessary to use them.
但有时有必要使用它。
Not that it is necessary, but I will do it.
没必要，但是我会做。
B: I will take a look and see if it is necessary.
B：我一会儿看看有没有必要加班。
I don't think it is necessary to leave so early.
我认为没有必要这么早走。
Thus, it is necessary to look for other solutions.
因此，有必要寻找其他的解决方案。
It is necessary to check db2diag.log for more information.
需要检查db2diag . log来获得更多信息。
In other cities, they don't think it is necessary to do that.
在其他城市，人们认为没有必要这样做。
Note that it is necessary to use a helper multiply function.
注意我们很有必要使用一个辅助乘法函数。
First, it is necessary to receive the approval of the regulators.
首先，必须得到监管机构的批准。
We considered it is necessary for him to answer the question.
我们认为他有必要回答这个问题。
Important: It is necessary to specify text at the end of the path.
要点：必须在路径的末尾指定text 。
To reap the benefits, it is necessary to update some of our best practices.
为了获得好处，必须更新我们的某些最佳实践。
One volunteer said, "I think it is necessary to promote such programs."
一名志愿者称：“我认为很有必要推进这样的项目。”
The customer identifies a feature and provides a reason why it is necessary.
客户标识某种特性并给出为什么这很有必要的理由。
The customer identifies a feature and provides a reason why it is necessary.
客户标识某种特性并给出为什么这很有必要的理由。
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