生物层，又名生物圈，（Ecosphere），是指地球上凡是出现并感受到生命活动影响的地区。是地表有机体包括微生物及其自下而上环境的总称，是行星地球特有的圈层。它也是人类诞生和生存的空间。生物圈是地球上最大的生态系统。
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双语例句原声例句
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过滤取决于薄薄的生物层的发展，该薄层称为动物神经层或去污层。
Filtration depends on the development of a thin biological layer, called the zoogleal layer or Schmutzdecke.
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骨架碳酸盐岩岩体类型有礁、礁丘和骨架生物层。
The framework carbonate rock bodies consists of reef, mound and framework organism layer.
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在火星和我们太阳系的其他行星上没有氧气，这意味着这些行星也缺乏保护地表生物免受紫外线辐射的臭氧层。
The absence of an oxygen atmosphere on Mars and other planets in our solar system means that these planets also lack an ozone shield that would protect surface-dwelling life from UV radiation.
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Lasik surgery Lasik surgery - now why that one, what makes you think of that as an example?
激光辅助屈光角膜层状重塑手术,为什么是激光辅助屈光角膜层状重塑手术,你为什么觉得它属于生物医学工程范畴呢
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The number of calories you guys consume as a part of your diet, if you're the average person, is much higher than used to be the case and that has very interesting biological implications that we'll discuss.
从作为饮食一部分的饮料中摄取的热量,就普通人的情况而言,和过去相比要高得多,这包含了一层有趣的生物学含义
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