When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.

有一天，汤普森家的看见他， “双壳贝！”

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，他们分析的对象限制在一类化石记录保完备动物——双壳类软体动物。

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与其他软体动物不同的是,双壳贝缺乏齿舌,具有唇瓣,物由鳃送到口部.

When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.

有一天，汤普森家的四胞胎看见， “双壳贝！”

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，将分析的对象限制在一类化石记录保完备——双壳类软体。

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与其软体同的是,双壳贝缺乏齿舌,具有唇瓣,可将食由鳃送到口部.

When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.

有一天，汤普森家的四胞胎看见他， “双壳贝！”

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保完——双壳类软体。

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与其他软体不同的是,双壳贝缺乏齿舌,具有唇瓣,可将食由鳃送到口部.

When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.

有一天，汤普森家的四胞胎看见他， “双壳贝！”

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完备物——双壳类软体物。

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与其他软体物不同的是,双壳贝缺乏齿舌,具有唇瓣,可将食物由鳃送到口部.

When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.

有一天，汤普森家的四胞胎看见他， “双壳贝！”

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完备动物——双壳类软体动物。

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与其他软体动物不同的是,双壳贝缺乏齿舌,具有唇瓣,可将食物由鳃送到口部.

When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.

有一天，汤普森家的四胞胎看见他， “双！”

To avoid sampling bias, they restricted their analysis to one group of animals—the bivalve molluscs—that fossilise well.

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完备动物——双类软体动物。

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与其他软体动物不同的是,双缺,具有唇瓣,可将食物由鳃送到口部.

When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.

有一天，汤普森家的四胞胎看见， “双壳贝！”

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，分析的对象限制在一类化石记录保完备——双壳类软。

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与其软不同的是,双壳贝缺乏齿舌,具有唇瓣,可食由鳃送到口部.

When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.

有一天，汤普森家四胞胎看见， “双壳贝！”

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，们将对象限制在一类化石记录保完备动物——双壳类软体动物。

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与软体动物不同是,双壳贝缺乏齿舌,具有唇瓣,可将食物由鳃送到口部.

When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.

有一天，家的四胞胎看见他， “双壳贝！”

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完备动物——双壳类软体动物。

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与其他软体动物不同的是,双壳贝缺乏齿舌,具有唇瓣,可将食物由口部.