| 单词 | procambium |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔primary xylem〕A type of xylem tissue derived from the procambium.初生木质部：由原成层转变而成的木质组织种类美国传统〔protophloem〕The first formed phloem that differentiates from the procambium.原生韧皮部：首次形成的韧皮部，用来区别原生层美国传统〔protoxylem〕The first formed xylem that differentiates from the procambium.原生木质部：最先形成的木质部，与原形成层不同美国传统 |
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