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