颖苞

例句：

1. 1. The young flowers are just beginningto bloom.
   这些年轻的花朵刚刚开始开花。
2. 2. The flowerbuds are the first signs of spring.
   花苞是春天的第一个迹象。
3. 3. Thebud is the smallest partof a flower that will eventuallygrow into a full-sized plant.
   花苞是一朵花的最小部分，最终会成长为一株完整的植物。