secondary xylem ray

例句：

1. 1. The secondary xylem ray is responsible for transporting water and nutrients throughout the plant.
   次生木质部射线负责在整个植物中输送水分和养分。
2. 2.In the process of photosynthesis, the secondary xylem ray plays a crucial role in transferring light energy to the leaves.
   在光合作用过程中，次生木质部射线起着将光能传递给叶子的重要作用。
3. 3. The secondary xylem ray is also known as the "vascular cambium" because it connects the primary xylemand the secondary xylem.
   次生木质部射线也被称为“维管形成层”，因为它连接着初级木质部和次生木质部。