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)。
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”。
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。
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。
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