To avoid sampling bias, they restricted their analysis to one group of animals—the bivalve molluscs—that fossilise well.
为了防止取样的偏颇,他们将分析的对象限制在一类化石记录保存完备动——双壳类软动。
To avoid sampling bias, they restricted their analysis to one group of animals—the bivalve molluscs—that fossilise well.
为了防止取样的偏颇,他们将分析的对象限制在一类化石记录保存完备动——双壳类软动。
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