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来源:雅诚德英语网
There is usually a good deal of turnover in species composition, even in a mature community.
即使在一个成熟的群落中,物种组成通常也有很大的变化。
There is usually a good deal of turnover in species composition, even in a mature community.
即使在一个成熟的群落中,物种组成通常也有很大的变化。