四個
拼音：sì gè英文解釋：
tetrad漢語造句：
- 我們把學生分成四個組。We divided the students into four groups.
- 這家百貨公司有四個緊急出口。There are four emergency exits in the department store.
- 他在結婚之前曾向四個姑娘求過婚。He wooed four girls before finally marrying one.
- 每首詩有四個詩節。There are four verses in each poem.
- 大多數汽車有四個前進擋。Most cars have four forward gears.
- 辛苦工作了四個小時後，他覺得非常餓。He felt very hungry after four-hours' hard work.
- 步行了四個小時以後，我們開始累了。After walking for four hours we were beginning to flag.