Which planets can sustain life?

哪些行星可以维持生命的存在？

《牛津词典》

Does life exist on other planets?

其他行星上有生命吗？

《牛津词典》

The theory supposes the existence of life on other planets.

这个理论假定其他行星存在生命。

《牛津词典》

In other words, they are a sort of savior-entity attempting to address the issue of scarcity and resource depletion by rescuing Earth (and Mars, as well as many other planets) from self-destruction by pooling our resources with a potentially unlimited number of other planets throughout the universe.

FORBES: Aliens, Global Warming, and the Intergalactic Arms Race

Several panel members have favored dividing planets into categories: terrestrial planets (Mercury, Venus, Earth, Mars), giant planets (Jupiter, Saturn, Uranus, Neptune) and a third class that would include Pluto.

NPR: Dwarf Planets May Finally Get Respect

According to Dr Lissauer, about 50 of the 1, 200 or so candidate planets (if planets they be) are orbiting in the habitable zones of their parental stars.

ECONOMIST: The search for other Earths is hotting up