| 释义 |
ˈecosphere
[f. eco- as in ecology + sphere n.]
The region of space including planets whose conditions are not incompatible with the existence of living things.
1953H. Strughold Green & Red Planet (1954) iv. 36 Only a small zone about 75 million miles wide—out of the 4,300 million that stretch between the sun and Pluto at its farthest point—provides a planetary environment well-suited to the existence of life. We might call this zone the thermal ecosphere of the sun. Other stars may have such ecospheres of their own. 1965Dole & Asimov Planets for Man iv. 109 To be habitable, a planet must be inside the ecosphere. |