1. Flowers are often pollinated by bees. 花常常由蜜蜂传授花粉。
2. They serve as food for animals, and pollinate plants. 它们为动物提供食物，还能为植物授粉。
3. Scientists at the University of Virginia recently reported that air pollution may prevent bees from finding flowers to pollinate. 维吉尼亚大学的科学家们最近报告说空气污染也许阻碍了蜜蜂发现授粉的花朵。
