It is not necessary to enroll before the course starts.

不需要在课程开始前注册。

youdao

It is not necessary to set down the rest of the oration.

没有必要把这篇演说的其余部分写下来。

youdao

It is not necessary to establish yourself as top dog or leader of the pack by using extreme measure.

没有必要用极端手段来确立自己领头羊或群体领导人的身份。

youdao

But it is not necessary for me to praise my superior.

VOA: special.2010.01.24

Here, too, gets a little ugly and this is why I tend not to like this construct, at least in C, but sometimes it's necessary or it's the simplest way to achieve this goal.

这里也有点难看的，这也是为什么我,不太喜欢这个结构，至少在C语言中，但是有时它是必须的,或者它是达到目标最简单的方法。

哈佛公开课 - 计算机科学课程节选

He says he believes it is necessary to let North Korea know having nuclear programs will prove to be a bigger disadvantage than not having them.

VOA: standard.2009.05.26

It is not necessary to invoke comparative advantage in order to defend such global free trade.

FORBES: In response to Ian Fletcher

It is not necessary to upgrade to a new AP in order to benefit from TDLS features.

ENGADGET: WiFi alliance begins Tunneled Direct Link Setup certification, hopes to improve media streaming

The only state where it is not necessary to register in order to vote is North Dakota.

BBC: US election: 10 oddities explained