有两萼片的

例句：

1. 1. The flower has five petals and a yellow center.
   这朵花有五片花瓣，中心是黄色的。
2. 2. The scientist studied the structure of the plant's leaves to understand its growth.
   科学家研究了植物叶子的结构，以了解其生长方式。
3. 3. The butterfly's wings are made up of many small, delicate petals.
   蝴蝶的翅膀由许多小而精致的花瓣组成。