free pollination

例句：

1. 1.The bees are known for their ability to perform free pollination.
   蜜蜂以其自由授粉的能力而闻名。
2. 2.This plant species is important for its ability to perform free pollination.
   这种植物物种因其自由授粉的能力而重要。
3. 3. Free pollination is essential for the survival of many plant species.
   自由授粉对于许多植物物种的生存至关重要。