共生动物群一群植物和动物，在有比较相似的环境条件的特定区域生活和相互影响

A group of plants and animals living and interacting with one another in a specific region under relatively similar environmental conditions.

兼性寄生的能在不同环境条件下活动的。用于某些生物，如细菌在有氧或无氧条件下都能生存

Capable of functioning under varying environmental conditions. Used of certain organisms, such as bacteria that can live with or without oxygen.