释义
n.
a spontaneous or natural liking or sympathy for someone or something
本性爱好，同情心
-
he had a special affinity with horses .他对马有天生的喜爱。
a similarity of characteristics suggesting a relationship, especially a resemblance in structure between animals, plants, or languages
（尤指动物、植物、语言之间结构的）类同，相似性。
[mass noun]relationship, especially by marriage as opposed to blood ties
（与血缘关系相对的）姻亲关系。
【主生化】 亲和力，亲和性。
词源
"Middle English （in the sense ‘relationship by marriage’）： via Old French from Latin