这或许是一次自然死亡，但是保安都是弱势群体。
It could be just natural causes, but security guards are an underprivileged group.
在自然界，群体普遍比单独个体生存得更好。
Groups always tend to work better than individuals in nature.
身为少数群体可能意味着，即便在高层，也不存在一个自然而然的人际网络。
Being gin a minority can mean that, even at the top, there is no natural network.
城市群体空间是经济和城市自然演化的必然结果。
City groups are the inevitable result of natural evolution of economy and cities.
城市群体空间是经济和城市自然演化的必然结果。
City groups are the inevitable result of natural evolution of economy and cities.
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