pluralise
/ˈplʊərəˌlaɪz/verb [vi. 不及物动词] vi. 身兼数职;成为复数(同 pluralize)
The rule is that you pluralise the "head" of the term. 名词词组复数变化的规则就是:变“重点词”。
verb [vt. 及物动词] vt. 使……成复数(同 pluralize)
But English is pretty simple: verbs hardly conjugate; nouns pluralise easily (just add "s", mostly) and there are no genders to remember. 但英语其实很简单:基本没有动词变位,名词变复数很容易(大多数情况下只用加字母“s”),而且无需记忆词性。