;
菜;When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.
有
天，汤普森家的四胞胎看见他， “双壳贝！”
动
]双壳的；[
]
瓣的When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.
有天，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
石记录保存完备动——双壳软体动。
Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.
与其他软体动不同的是,双壳贝缺乏齿舌,具有唇瓣,可将食由鳃送到口部.
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