411 REFERENCE · Wikibooks
Pinyin/Series
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Pinyin#Pinyin tone marking
A series is a set of similar things that follow one after another.
xihlieh shih 1-zuu 1'g jie'zhe 1'g d leihsih shihwuh.