英语语法分析

It is found in protoxylem and first metaxylem tracheids and vessels.

可在原生木质部和初始后生木质部的管胞和导管中见到。

Basipetal differentiation is seen in the formation of proto-and metaxylem in the stem.

在茎原生木质部和次生木质部的形成过程中可以看到这种类型的分化。

The primitive exarch and diarch haplostele with cross-like metaxylem exists in the lower part of CNZ.

在子叶节区下部存在原始的外始式二原型十字形单中柱。