单词 | 于原生 |
例句 | DEFINITIVE EXAMPLES 权威例句〔metaxylem〕The part of the primary xylem that differentiates after the protoxylem and is characterized by broader vessels and tracheids.后生木质部:初生木质部中不同于原生木质部的一部分,以更宽的导管和管胞为特征美国传统 |
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