Radix superior

例句：

1. 1.The tree's Radix superior is visible from the top of the hill.
   从山顶上可以看到这棵树的主根。
2. 2.The scientist studied the Radix superior of the plant to understand its growth patterns.
   科学家研究了这种植物的茎干，以了解其生长模式。
3. 3. The Radix superior of the flower was used as a medicinal herb.
   这种花的主根被用作药用草药。