biosphere

名词 biosphere:

1. the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist

bi.o.sphere

n.（名词）
The part of the earth and its atmosphere in which living organisms exist or that is capable of supporting life.
生物圈：地球及其大气中有生物生存或能够维持生命的部分
The living organisms and their environment composing the biosphere.
生物圈：组成生物圈的生物及其环境的总和

【引伸】
bi.ospher.ic