symbiotic association造句怎么写

"Any of about 15,000 species of small, colourful, scaly plants that consist of a symbiotic association of algae (usually green) and fungi (see fungus)."

Through photosynthesis the algal cells provide simple sugars and vitamins for Both partners in this symbiotic association.

The symbiotic association of the mycelium of a fungus with the roots of certain plants, such as conifers, beeches, or orchids.