音标：['baiәsfiә] ；柯林斯词典等级：1 级；

n. 生物圈
[医] 生物圈, 生物层

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

词型变化：名词复数形式 : biospheres
考试类型：[GRE]

词性分布：

名词100%

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advertising impression

articuli

Azalea L.

blindenhorn (blinnenhorn)

botello

brand-goose

bride-lace