procambial strand

例句：

1. 1. The tree's growth is closely linked to the development of its proximal strand.
   这棵树的生长与其韧皮部带的发展密切相关。
2. 2.The study of plant anatomy often involves examining the proximal strands of the cambium.
   植物解剖学的研究通常涉及到观察韧皮部的带状组织。
3. 3.The cambium acts as a bridge between the outer bark and the inner wood, providing structural support for the tree.
   韧皮部作为外层树皮与内层木质之间的桥梁，为树木提供结构支撑。