n. 等级；课程；种类；纲；（大学成绩的）等级（class 的复数）
vt. 将……分类（class 的第三人称单数）
1.It was when she started drama classes that she really came out of herself.
她是在开始学习戏剧课程时才真正不再害羞。
2.Her mother enrolled her in acting classes.
她母亲给她报了表演班。
3.Large classes dilute the quality of education that children receive.
大班上课会降低孩子所受教育的质量。
4.He has offended the party's traditional base by pandering to the rich and the middle classes.
他迎合富人和中产阶级，触犯了该党的传统基础。
5.Some people are unwilling to attend the classes partly because of the cost involved.
有些人不愿来上课，部分原因是所需的费用问题。
6.He acquired a law degree by taking classes at night.
他通过上晚上的课获得了法律学位。
7.Do you think that mixed-ability classes hold back the better students?
你认为把不同能力的学生混合在一起的班级会妨碍较高水平学生的进步吗？