pterylae

例句：

1. 1.The pterylae is a rare and beautiful flower that blooms only once a year.
   这种花一年只开一次，非常罕见且美丽。
2. 2. The pterylae is a symbol of beauty and elegance.
   这种花象征着美丽和优雅。
3. 3. The pterylae is a popular choice for wedding flowers.
   这种花是婚礼上常见的选择。