zài / méiyǒu / zhōngbiǎo / de / niándài / rénmen / chángyòng / gēnglòu / lái / gūsuàn / yèlǐ / de / shíjiān

在没有钟表的年代，人们常用更漏来估算夜里的时间。

In an era without clocks, people often used water clocks to estimate the time during the night.