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1·Remember that forgiveness does not mean it is necessary to become friends again with the person who upset you.

记住，宽恕并不意味着你必须和惹你心烦的人再次成为朋友。

2·Sometimes it is necessary to say no.

有时候说“不”是必要的。《柯林斯英汉双解大词典》

3·It is necessary to examine how the proposals can be carried out.

有必要调查一下怎样才能实施这些方案。《牛津词典》

4·To understand why they are doing it, it is necessary to know where they are coming from.

要理解他们为什么这样做，有必要知道他们的想法。《柯林斯英汉双解大词典》

5·It is necessary to learn to manage time and make good use of every minute.

有必要学会管理时间，好好利用每一分钟。

6·It is necessary to read the labels on the foods in a shop as well.

阅读商店里食品的标签也是必要的。

7·It is necessary to encourage kids to come up with new ways to make use of technology in school life, the head of the school added in the interview.

“有必要鼓励孩子们想出新的方法，在学校生活中利用技术。”该校负责人在采访中补充说。

8·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。

9·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。

10·It is necessary to provide specific praise about actual actions performed and efforts made in the process.

对过程中的实际表现和付出的努力给予具体表扬是有必要的。