vascular bundle sheath

• 维管束鞘

vascular bundle sheath的用法和样例：

例句

1. It shows two well-developed sheaths around the vascular bundles.
   它显示出两个发育完全之维管束鞘位于维管束周围。
2. The spongy cell arranged densely.The vascular bundle sheat and the phloem were colored more red.
   维管束的导管口径变小，维管束鞘和韧皮部的细胞番红染色加重。