支脉

例句：

1. 1. The river flows through the town, carrying the life force of the community.
   这条河流穿过这个城镇，携带着社区的生命活力。
2. 2. The scientist studied the structure of the molecule to understand its function.
   这位科学家研究了分子的结构，以理解其功能。
3. 3. The tree's roots are like a network of veins, providing support for the entire tree.
   这棵树的根就像一张网络状的血管，为整棵树提供支撑。