意思：教学日，在校上课的日子。
school day 英 [sku:l dei] 美 [skul de]
例句：
1.He favors extending the school day and school year.
他赞成增加每天的课时并延长学年。
2.The school day is divided into seven periods.
学校一天有七节课.
3.The council does not support lengthening the school day to fit in other activities.
委员会不支持通过延长在校时间来插入其他活动。
