打瞌睡: doze off; nod 短语和例子工作[看书]时打瞌睡 doze over one's work [book]; 那只猫在炉边打瞌睡。 the cat dozed off by the fire. 祖母下午常常打瞌睡。 grandmother often nods off during the afternoon
上课: 1.(学生听课) attend class; go to class 短语和例子他昨天没来上课。 he didn't come to class yesterday.2.(教师讲课) conduct a class; give a lesson 短语和例子学校八点开始上课。 classes begin at 8