xylem element造句

例句与造句

1. Protoxylem the primary xylem elements that are formed from the procambium first
   原生木质部：初生木质部的成分，最早由原形成层形成。
2. Lumen the central space that remains , surrounded by cell walls , in a cell that has lost its living contents ( e . g . in xylem elements )
   胞腔：由细胞壁围成的空腔，其中的活性物质消失（如木质部中的管状分子） 。
3. It's difficult to find xylem element in a sentence. 用xylem element造句挺难的