one-to-one
adj.（形容词）Allowing the pairing of each member of a class uniquely with a member of another class.一对一的：让这一组的成员和另一组的成员一一匹配的Mathematics Relating to or being a correspondence that assigns to each member of one set a unique member of another set.【数学】 一比一：一组的数字和另一组的数字相比而形成一定的联系和概念
