The periderm is the secondary protective tissue of the rhizome, and is composed of pellem, pellogen and phelloderm;
皮由木栓层、木栓形成层和栓内层组成；
皮The periderm is the secondary protective tissue of the rhizome, and is composed of pellem, pellogen and phelloderm;
皮由木栓层、木栓形成层和栓内层组成；
声明：以上例
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，
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