pollen grains of cultivated plants

例句：

1. 1. The bees collect pollen from flowers to make honey.
   蜜蜂从花中收集花粉来制作蜂蜜。
2. 2. Pollen is a natural part of many plants that helps them reproduce.
   花粉是许多植物自然的一部分，有助于它们繁殖。
3. 3. The pollen grains on the petals are sticky and attract insects.
   花瓣上的花粉粒是粘性的，吸引昆虫。