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。
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。
The impaired organ, tissue, etc. Of mollusc host caused by parasitism.