“有…重”造句
许多民歌有 “ 重复句 ”, 即每一段都有规则地重复出现的单独句.
Many folk songs have " refrains ", that is, regularly repeated independent elements attached to each stanza.
在重图中允许有重边和重自环, 自环是一种特殊的边.
In a multigraph both multiple edges and multiple loops are allowed; aloop is a special edge.
您看东西有重影 吗 ?
Do you see an object as if there were two that overlap?