u‧ni‧ty W3 / junəti, junɪti / 名词 ( 复数形式 unities )

1 [不可数名词] when a group of people or countries agree or are joined together :

economic unity

European unity

2 [不可数名词] the quality of having matching parts :

His essays often lack unity.

3 [可数名词] technical one of the three related principles that say a play should be about a single set of related events which happen in one place on one day