preorder这个词的定义是：

Preorder - In mathematics, especially in order theory, preorders are binary relations that satisfy certain conditions. For example, all partial orders and equivalence relations are preorders. The name quasiorder is also common for preorders. Other notations are pre-order, quasi-order, and quasi order. ...

这里该如何翻译好呢？我遇到的原句是这样的：

...Consumer i's preferences are represented either by a preordering(that is, by a complete,reflexive, transitive binary relation)denoted by R^i, or by a utillity function denoted by U(.)。。。。。这里的preorder意思明白了，但是应该如何翻译呢？谢谢各位高手啊