physical and biotic environment 物质和生物环境
biotic environment factor 有机环境因素
Engineering of Agricultural Biotic Environment 农业生物环境工程
biotic c environment 生物环境
Forest fragmentation causes large changes of the physical environment as well as biotic changes in forest edges.
森林片断化引起了森林边缘物理环境与生物的变化。
Heredity is controlled by genes, but their expression is turned on and off throughout life depending upon biotic and abiotic factors in environment.
作物基因表达一方面受到遗传基因的控制，另一方面，环境中的生物与非生物因素对基因表达也起到重要的调节作用。
The black unit including a biotic extinction was caused by oceanic anoxic event. Crisis that deepwater keeled foraminifera encountered represents a ferocious anoxia in deep marine environment .
黑层段是大洋缺氧造成的结果，生物大量灭绝，深层水具旋脊有孔虫的所遭受的危机反映出当时海洋深层水体严重缺氧的特征；
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