Like animals that eat a certain plant and that plant relies on a certain fungus to help it get nutrients from soil and on a certain insect for pollination.
比如动物吃某种植物，而这种植物依靠某种真菌从土壤中获取营养，依靠某种昆虫来授粉。
2
We don't have insect problem, we don't have disease problems that linger in soil from one year to the next.
还没有害虫问题，不像土壤种植那样年复一年地出现疾病问题。
3
In exchange, they enrich the soil, pollinate flowers, and gobble up insect pests.