pollen grain

例句：

1. 1. The pollen grains on the flower attract bees to collect nectar.
   花朵上的花粉粒吸引蜜蜂来采集花蜜。
2. 2. Pollen grains are tiny seeds that grow in plants and help them reproduce.
   花粉粒是植物中的微小种子，它们帮助植物繁殖。
3. 3. During the flowering season, the pollen grains are released from the flowers and carried by wind to other plants.
   在开花季节，花粉粒从花朵中释放出来，被风带到其他植物上。