There are three main types of symbiotic relationships: parasitism, commensalism, and mutualism.
共生关系主要有三种类型：寄生关系、共生关系和互惠关系。
2
Parasitism is a kind of predator-prey relationship in which one organism, the parasite, derives its food at the expense of its symbiotic associate, the host.
寄生是一种捕食者与被捕食者之间的关系，寄生者利用共生伙伴——宿主来获取食物。
3
The impaired organ, tissue, etc. Of mollusc host caused by parasitism.