The degree of variation of living organisms - animals, plants, their habitats and their genes - within a given terrestrial or marine ecosystem. This includes diversity within species, between species, and of ecosystems.
行业： 生物学; 环境
在太阳或月亮周围的天空，朦朦胧胧的一圈白色或彩虹彩色光。
线沿地球和天空似乎满足。地平线经常看起来平坦的但它实际上稍弯曲。
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