是个不规则复数名词。

Mice" is an irregular plural ."

youdao

我没有使用不规则复数单词的经验；datum 和 data 等单词可能会令 Rails 出现问题。

I have not experimented with words having irregular plurals; words like datum and data might trip up Rails.

youdao

通常未发布的一套已成惯例的规则或作法，意在尽量减少混乱或冲突。通常用于复数。

A set of established rules or practices, usually unstated, intended to minimize confusion or conflict. Often used in the plural.

youdao