Taking from the Earth only the strictly necessary.

他们只从地球获取必须的用品。

No prior musical experience is necessary.

定需要有音乐经验。

So just a little reminder, no experience necessary, no prerequisite.

提醒下 需要非得有经验 也需要先决条件。

Second, use necessary chores or meals as breaks from studying.

其次，将做家务或吃饭作为学习的间歇休息时间。

I've decided not to wake you at dawn unless absolutely necessary.

我本来决定除非特别必要然会在清晨叫醒你。

It was necessary, therefore, to invent instruments that neither slumbered nor slept.

因此，有必要发明仪器，既打盹儿，也睡觉。

Are fleets and armies necessary to a work of love and reconciliation?

对需要爱和和解的事业，难道战舰和军队必要的吗？

Morty It's necessary for the plan, Morty.

啥 What? ! 这为了我们的计划。

It even provides the heat and energy necessary for life to survive on Earth.

它还为生命提供生存于地球所必需的温度和能量。

It's a kind of thinking that's very important, even necessary, to do!

这非常重要，甚至必须进行的思考！

I know modernization is necessary for advancement.

我知道要进步就必须要现代化。

It's not necessary to reply to a mass email sent to numerous recipients.

没必要回复群发邮件。

A dynamic government is necessary to meet the demands of a changing society.

个有活力的政府必须适应社会的改变。

" Necessary? No, I should not say that it is necessary to kill."

“定？，我认为定要杀人。”

Today in China, management may also be considered more and more necessary.

今天在中国经营管理也被认为越来越必需的工作了。

If necessary, it should be supported by drawings.

必要的话，说明书应配有插图。

" Is that all that is necessary? "

“那就所有必要的吗？”

We convinced him that it was necessary to stay.

我们使他相信有必要留下。

If necessary, you can say which department you work in.

如有必要，你可以说出工作所在的部门。

Constant vigilance is necessary in order to avoid accidents.

为了避免意外事故， 必须经常保持警惕。