You may wonder if light is also needed for life to form.

你可能会想阳光是不是生命形成的件。

Power is required for the accumulation of money and then the retention of that money.

权力是积累金钱和保存金钱的件。

One of the essential requirements of good news writing is accuracy.

优秀新闻报道的件之一是准确。

Owning your weaknesses is necessary for your success and your self-confidence.

正视自己的弱点是成功和自信的件。

Acknowledging this as a fact is a necessary condition for achieving peace.

承认一点为事实是实现和平的件。

To create clouds, and to have rain, the air has to be cooled.

想产生云彩，进而下雨，空气遇冷是件。

Pressure control is another necessity inside any ocean habitat.

可控的压力是建造海洋栖息地的另一个件。

Well, we gotta get ready for hibernation somehow! Eating a lot is definitely a requirement!

我们得为冬眠做好准备呀！大吃特吃可是件！

The SAT is a test many American colleges require as part of the admissions process.

SAT试是美国许多大学录取过程中的一件。

If Clipper and JUICE do manage to find the conditions necessary for life.

如果欧罗巴快船和 JUICE 确实能够找到生命的件。

He also called for political preparations and necessary conditions for the next phase of exchanges.

他还呼吁为下一阶段的交流做好政治准备和件。

What is needed is an unexpected abundance of such signals.

样的迹象出乎意料地频繁出现是一个件。

So, what if 'doing' isn't always necessary to get things done?

那么，如果“做”并不总是完成事情的件呢？

And that change will only occur if four key elements are met, notes the WHO.

种改变发生的件是以下4个因素满足，是WHO的观点。

Salt is important to fetuses and children because it is required for optimal growth.

盐对胎儿和儿童都至关重，因为盐是优先生育的件。

I don't necessarily think that wildflowers are necessary to keep the globe spinning and people alive.

我不认为野花是保持地球旋转和人们活着的件。

Despite a popular theory, having a moon is no longer a requirement for life to exist.

尽管有个流行的理论认为月球不再是生命存在的件。

This seapower approach to the world became the sine qua non of early American foreign policy.

种对世界的海权方针成为早期美国外交政策的件。

Have fewer traces of copper than those of Europe, Essential for the formula to work.

与欧洲出产的银矿石相比 含铜量更少，而铜正是种化学反应生效的件。

He added: A high-precision landing is a necessity for further exploring the moon and asteroids.

“高精度着陆是进一步探索月球和小行星的件。