parallel venation

• 平行脉

parallel venation的用法和样例：

例句

1. The veins of leases are parallel, and the vascular bundles have bundle sheaths.
   平行脉序，维管束具有维管束鞘。
2. Leaves alternate, spirally arranged, large, veins pinnate and parallel, base sheathing.
   叶互生，螺旋状排列，大，羽状劢和平行脉，基部具鞘。