leaf lamina

例句：

1. 1. The tree is covered in green leaves.
   这棵树长满了绿叶。
2. 2. The leaf on the branch is turning yellow.
   树枝上的一片叶子正在变黄。
3. 3. The scientist studied the leaves of the plant to find out how it grows.
   科学家研究了这种植物的叶子，以了解它如何生长。