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1·At the beginning, the pupils put solutions to the homework on the board, then the teachers comment, correct or elaborate as necessary.

一开始，小学生们将家庭作业的答案写在黑板上，随后老师评论、纠正，或在必要时详细解释。

2·For her, books were as necessary to life as bread.

对她来说，书就像面包一样是生活的必需。《柯林斯英汉双解大词典》

3·Salah Sukkarieh, a professor at the University of Sydney, sees robots as necessary given how cattlemen are aging.

悉尼大学的教授萨拉赫·苏卡瑞认为，鉴于养牛人的老龄化，机器人是必要的。

4·Repeat every few days as necessary.

必要时每隔几天重复一次。

5·Tune your data source as necessary.

必要时需要调优数据源。

6·Change a Make changes as necessary.

更改——进行必要的更改。

7·Adjust your walk schedule, as necessary.

如果需要调整你的步行安排。

8·Repeat for other clone nodes as necessary.

按需为其它克隆节点重复此过程。

9·Open the template and modify as necessary.

打开这个模板并作一些必要的修改。

10·I will trim my nose hair as often as necessary.

我会按需要经常修剪鼻毛。