Scientists have set thresholds for key environmental processes that, if crossed, could threaten Earth's habitability.
科学家们已经设定了一些主要环境指标的安全阈值，而一旦超出这些值，将会危害到地球物种的生存。
Those ideas about terrestrial planet formation and habitability of terrestrial planets will need to be re-evaluated from scratch.
那些关于类地行星形成与类地行星可居住性的概念将需要从头开始重新进行评估。
Mankind faces "a planetary emergency", he said; "a crisis that threatens the survival of our civilisation and the habitability of the Earth."
他说人类正面临“星球危机”，“一个威胁着人类文明延续和地球可居住性的紧要关头”。
No one has yet discovered any extrasolar moons, but some researchers think the capacity to detect them-and even analyze them for habitability-may be just over the horizon.
目前还没有任何设备发现太阳系外的卫星，不过一些研究者认为人类具有探测到系外卫星的能力——甚至分析它们是否适合居住——可能已初现端倪。
Evidence of habitability is not, of course, the same as evidence of habitation.
当然，适宜居住的证据并不能证明存在生命。
However, to really assess Mars' habitability we need to consider the properties of its water.
但要真实评估火星的宜居程度，我们还需要考虑火星的水的特性。
"Perhaps arsenic is not an essential component for habitability or for life, but it may be one that can be tolerated," she added.
“也许砷并非生命生存的必要元素，但它可能是一种可接受的元素，”她补充道。
Even before the space telescope takes flight, scientists expect to learn more about the habitability of our nearest planetary neighbor.
甚至在太空望远镜升空之前，科学家们就已经在试图了解我们最近的行星邻居是否可以居住。
And the traditional shape planning is limited to housing and environmental program, which can not satisfy the requirement of community habitability of old age.
叙述了传统的形体规划局限在住房与环境规划之中，无法满足老龄化社区的适居性。
From that data, they've devised what they term the "habitability metric," a value representing a planet's temperature and mass that determines whether or not it can support life.
从这些数据中，他们设定了一个称为“可居住度”的值，代表一颗行星的温度和质量，决定了它是否能支持生命的存在。
Most of those planets are more massive than Saturn, which makes them unpromising from a habitability standpoint-such giants tend to be gaseous bodies without a surface to walk on.
大部分这些行星的体积比原本体积较大的土星还要大，这使得它们都不太适宜人类居住——因为这些体积巨大的行星往往都是气体行星，像土星一样没有可供行走的固态表面。
Very large optical interferometry telescope arrays on the Moon will not only detect planets around other stars, but also analyze their atmospheres and characterize their habitability.
设置在月球的巨大的光学干涉法望远镜阵列，将探测太阳系周围其他星球，而且对它们的环境特征和是否具备生存条件进行分析。
"I think we're in basic agreement on" the habitability of the Hadean, says geophysicist Norman Sleep of Stanford University in Stanford, California, who has done similar calculations.
“我认为，我们在冥古代适于生存的问题上意见基本一致，”加州斯坦福大学的地球物理学家诺曼·斯利普说。
The Planet Habitability Index produced different results.
行星的宜居指数产生不同的结果。
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In their paper, the authors propose two different indices: an Earth Similarity Index (ESI) and a Planetary Habitability Index (PHI).
在他们的论文中，作者提出了两个不同的指标：地球相似性指数(ESI)和行星的宜居指数(PHI)。
In their paper, the authors propose two different indices: an Earth Similarity Index (ESI) and a Planetary Habitability Index (PHI).
在他们的论文中，作者提出了两个不同的指标：地球相似性指数(ESI)和行星的宜居指数(PHI)。
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