To counteract this oxygen would have to be diluted with non reactive gas.

为了制造这种情况，氧中空比率需要利用惰性体来降低。

Below 25 meters, inert gases like nitrogen can trigger a condition called inert gas narcosis, which alters your central nervous system, leading to faulty judgment and hallucinations similar to the effects of an anesthetic.

在25米以下，像氮这样惰性体会引一种叫做“惰性体麻醉”病症，这种病症会改变人中枢神经系统，会导致你出错误判断和幻觉，类似于麻醉剂效果。

Nitrogen is an inert gas, so high temperatures and pressure changes have less effect.

氮是惰性体，所以高温和压强变化不会对它产生很大影响。

But most of Earth's nitrogen exists as an inert atmospheric gas that organisms can't use.

但地球上绝大多数氮都是以一种生物体无法使用惰性体形式存在。

Less than what needed to boil a cup of coffee. Thick windows filled with inert gas are almost impossible to break and help keep the house warm, an important feature because two out of four walls are made of glass.

低于煮一杯咖啡所需能量。充满惰性体厚厚窗户几乎是不可能打破，这还有助于房屋保暖。这是一个重要特征，因为四面墙中有两堵是用玻璃做。

Finally, he left clues that led directly to the discovery of the group of elements known as the noble gases, some of which are so elusive that the last of them wasn't found until 1962.

最后，他还留下线索，直接导致一组名叫惰性体元素。其中有几种是极难获得，最后一种直到1962年才被。

Basically, helium is very useful for us because it doesn't really do anything; it's totally inert; it doesn't explode like hydrogen, it doesn't corrode like oxygen.

氦对我们非常有用，因为它”什么事情也不会做“；它是惰性体；不像氢一样易爆，也不像氧一样容易腐蚀。

And so these big spikes that you can see are ending with these noble gases, those are going to be those different shells.

所以这些你可以看到大尖峰以这些惰性体结束, 这些将是不同外壳。

He says saturation diving technology enables human beings to withstand high water pressure by saturating human tissue with inert gas.

他表示，“饱和潜水”技术，让潜水员体内各组织体液中所溶解惰性体达到完全饱和程度，来适应高压环境。

They examined fluids seeping out of fractures in a mine and found particular isotopes of the noble gas xenon.

他们查看从矿井裂缝中渗出液体，从中了惰性体氙特殊同位素。

Most of it, about 92%, is hydrogen. A further 8% is helium, which is chemically inert.

大部分（约92%）体是氢，另外8%是惰性体氦。

And so let's throw a noble gases up here.

因此我们把惰性体放在这里。

Noble gases are elements that already have that shell filled, so unless they lose an electron, they don't need to interact with anything — and it's very hard to force them to.

惰性体是原子最外层电子已饱和元素，所以，除非它们失去一个电子，否则它们不需要与任何原子生反应——强迫它们参与反应是很难。

To avoid inert gas narcosis, many divers fill their tanks with Heliox, which combines 21% oxygen with 79% helium.

为了避免惰性体麻醉病症，许多潜水员会在水箱中注入一种氦氧混合剂，这可以将21%氧和79%氦混合在一起。

So maybe there are some solutions for our helium-related problems, but some applications are just going to require a noble gas that's lighter than air and there's only one of those.

因此，我们氦相关元素短缺问题可能有解了，但一些应用还需求比空更轻惰性体，这样惰性体只有一种。

And so as we move from the left to the right, we're going to increase how much that atom wants an electron, at least until we get to the noble gases.

因此， 当我们从左向右移动时，我们会增加原子需要电子数量，至少直到我们得到惰性体。

A noble gas is an example of that.

惰性体就是一个例子。

Halogens, Noble gases, lanthanides or rare earth elements.

卤素、惰性体、镧系元素或稀土元素。

Helium, an ultra-stable, very low-energy noble gas, has 2.

氦是一种超稳定、能量极低惰性体， 具有 2.

Yep, it's unreactive, it's an inert gas.

没错，它不活泼，是一种惰性体。