小孢子

例句：

1. 1. The pollen grains are spread by wind and water.
   花粉粒通过风和水传播。
2. 2. Pollen is the building block of flowers.
   花粉是花的构建块。
3. 3. Insects are the natural pollinators for many plants.
   昆虫是许多植物的自然传粉者。