So why did Mars lose its protective shield?

那么，火星为什么会失去保护罩呢？

And so it lost the heat that powered the dynamo that generated its protective shield.

因此它失去了为发电机提供动力的热量，而发电机会产生它的保护罩。

Back in the 1980s, countries agreed to stop producing the chemicals that damage the atmosphere's protective shield.

早在 20 世纪 80 年代，各国就同意停止生产破坏大气保护层的化学物质。

In this training video, they show how to deploy the fire shelter, a protective shield, a last resort move.

在这段培训视频中展示的就是他们如何部署消防避难所，这是最后的防护盾措施。

Maybe one day we'll build a protective shield around the Earth to prevent something like this from affecting us.

也许有一天我们会在地球周围建立一个保护罩，以防止类似的事情影响我们。

Nineveh summons her picked troops, yet they stumble on their way. They dash to the city wall; the protective shield is put in place.

尼尼微王招聚他的贵胄；他们步行绊跌，速上城墙，预备挡牌。

When they're bombarded by radiation or chemotherapy, some cancer cells can effectively switch on protective shields against whatever's attacking them by changing their gene expression.

当它们受到放射或化学疗法的轰击时，一些癌细胞可以通过改变它们的基因表达来有效地打开保护盾来抵抗任何攻击它们的东西。

Right. So in this headline, it's saying that if nothing changes, if everything carries on the way that it is now, then the Earth's ozone layer — this protective shield — will have recovered by 2066.

没错。因此，在这个标题中，它说的是，如果什么都不改变，如果一切都照现在这样进行下去，那么地球的臭氧层——这个保护层——将在 2066 年恢复。

You see, the snow is meant to serve as a protective shield against sunlight, but because the world is getting hotter, precipitation is falling more as rain instead of snow in certain areas.

你看，雪本来是用来遮挡阳光的，但由于世界越来越热， 在某些地区降水更多地以雨而不是雪的形式落下。

When Phil died four years ago, I was so overwhelmed, vulnerable and cracked open that anger became my protective shield, the only thing between me and collapse, wrote Hoffman's wife Mimi O'Donnell, in an essay for this project.

“四年前菲尔走的时候，我悲痛欲绝，脆弱极了，我的心被撕开了一道口子，愤怒成了我的外衣，成了让我没有崩溃的唯一原因，”霍夫曼的妻子米米··奥唐纳在为本项目创作的文章中写道。