| 单词 | conducting system |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔tracheophyte〕Any of various vascular plants, including seed plants and ferns, having a conducting system of xylem and phloem.导(维)管植物:任何种类的维管植物,包括种子植物和蕨类植物,具有木质部和韧皮部导管系统美国传统 |

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