fourth meaning in English
n.
每月的四日；【音乐】四度音程，四度和音，第四音； 〔pl.〕 【商业】四级品。 a fourth part 四分之一。 the (glorious) F- ＝ the F- of July 美国独立纪念日。
Examples
- He himself had only finished the fourth grade .
他自己只上完四年级。 - What was that fourth priority, sir ?
先后次序的第四条是什么，长官？ - They hit pay dirt on the fourth day .
第四天，他们就发现了苗头。 - A fourth model may be tested for flutter speed .
第四个模型可用来进行颤振试验。 - Marry stood me up last night, and it was the fourth time .
玛丽昨夜又失约了，这已是第四次了。