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měi gè shū rǔ guǎn jūn chéng shù zhuàng fēn zhī gòu chéng yī gè dǎo guǎn xì tǒng
每个输乳管均呈树状分支,构成一个导管系统。
Each input duct showed a uniform tree branches to form a duct system.
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