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