题目选项分析

Atmospheres that contain water and, possibly, multicellular life, on planets within the habitable zone, the shell-shaped region of space surrounding a star within which a planet could maintain liquid water on its surface, is the much more likely to be harbored rather than on more distant planets.

Planets within the habitable zone, the shell-shaped region of space surrounding a star within which a planet could maintain liquid water on its surface, are much more likely than more distant planets to harbor atmospheres which contain water and, possibly, multicellular life.