And of course, I'll keep looking for the strange and scary biosignatures like phosphine.

当然，我还会继续寻找像磷化氢一样奇怪又可怕的生物印记。

In the context of Earth, oxygen is a wonderful biosignature, but oxygen is not that hard to make.

在地球，氧气是一个完美的生物印记，但是氧气并不难制造。

The researchers made a three-part case for methane as a possible biosignature.

研究人员从三个方面论证了甲烷是一种可能的生物标志。

And finding any biosignatures will be challenging for many reasons.

由于多种原因， 找到任何生物特征都将具有挑战性。

And that means Europa Clipper and JUICE both might get a chance to fly through them to look for biosignatures.

这意味着“欧罗巴快船” 和 JUICE 都可能有机会飞过这些裂缝，寻找生物特征。

Scientists will be looking for biosignatures.

科学家们将寻找生物特征。

And I look for the fingerprints of molecules that could be associated with life, or biosignatures, like complex pollutants or oxygen.

我寻找这些与生命相关的存在于分子上的痕迹或者是生物印记，像是结构复杂的污染物或是氧气。

The second issue defining alien life will be to interpret what these biosignature gases actually mean.

定义外星生命的第二个问题是解释这些生物特征气体的实际含义。

This would make it difficult to directly observe from a great distance, so astrobiologists seek clues called biosignatures.

这将使从很远的距离直接观察变得困难，因此天体生物学家寻找称为生物特征的线索。

Scientists are working to understand the signs of life, known as biosignatures, that might be present in observations of planets in other solar systems.

科学家们正在努力了解生命的迹象，即所谓的生物标志，这些迹象可能存在于对其他太阳系行星的观测中。

So I figured, maybe other planets with life less reliant on oxygen than ours could also have phosphine, but as a really popular biosignature.

所以我想，也许其他行星有生命对氧气的依赖程度比我们的低也会有磷化氢，可当作普及的生物印记。

When I first started working on phosphine about a decade ago, people had a hard time thinking of it as a biosignature at all.

大约十年前我第一次研究磷化氢时，人们很难把它视为生物标记物。

And this is what makes the preliminary detection on Venus of phosphine, a potential biosignature gas, so compelling but also so confusing.

这就是在金星上初步检测到磷化氢（一种潜在的生物特征气体）如此引人注目但又如此令人困惑的原因。

Unlike other possible biosignatures such as atmospheric oxygen, methane is one of the few gases that could be detected by using the James Webb Space Telescope.

与大气中的氧气等其他可能的生物标志不同，甲烷是少数几种可以通过詹姆斯·韦伯太空望远镜探测到的气体之一。

The next phase of exoplanet exploration will be the search for biosignatures, these are telltale chemical signs like oxygen or methane in those far-away atmospheres.

系外行星探索的下一阶段将是寻找生物特征，这些是遥远大气层中的氧气或甲烷等化学信号。

So the more we're looking at different biosignature gases, the more we realize that there's no single gas that's enough to understand a planet and to claim alien life.

因此，我们对不同生物特征气体的研究越多，我们就越意识到没有一种气体足以了解一颗行星并宣称存在外星生命。

In its 14-year operative lifespan, Percy will collect samples and search for biosignatures, which could indicate the presence of microscopic life on Mars; but Percy will also test the habitability of Mars for human colonists.

在其 14 年的运行寿命中， Percy 将收集样本并寻找生物特征，这可能表明火星上存在微观生命； 但珀西还将为人类殖民者测试火星的可居住性。

On Earth, these clays often preserve biosignatures, so here Perseverance will look for organic compounds that could betray the existence of past microorganisms. Continuing its quest for ancient life, the rover will traverse rough sandstone.

在地球上，这些粘土通常保存着生物特征，因此毅力号将在这里寻找可能暴露过去微生物存在的有机化合物。 为了继续寻找古代生命， 漫游者将穿越粗糙的砂岩。

Perhaps there's life on an exoplanet, and we would be able to see evidence of life, either through atmospheric biosignatures or through, you know, a dramatic picture, we would be able to see something actually on the surface.

也许系外行星上有生命，我们将能够看到生命的证据， 无论是通过大气生物特征还是通过戏剧性的图片，我们都能够在表面上看到一些实际的东西。

Indeed, phosphine seems to be safely and enthusiastically produced in all of these oxygen-poor ecosystems. So I figured, maybe other planets with life less reliant on oxygen than ours could also have phosphine, but as a really popular biosignature.

事实上，磷化氢似乎在所有这些缺氧生态系统中都能安全而积极地生产。所以我想，也许其他生命对氧气的依赖程度低于我们的行星也可能有磷化氢，但作为一种非常受欢迎的生物特征。