tap root

例句：

1. 1. The tree's tap root is visible through the soil.
   这棵树的根从土壤中可见。
2. 2.The roots of the plant are deeply buried in the earth.
   植物的根深深地埋藏在土里。
3. 3.The roots of the tree are strong enough to support its weight.
   这棵树的根足够强壮，能支撑它的体重。