"Dismiss early"是学生提前下课的常用表达方式。这个表达方式来自于英语中动词"dismiss"的意思，即"解散、解雇、开除"。

在学校中，"dismiss"通常用来指学生提前结束课程或活动。例如：

The teacher dismissed the class early because of a school-wide assembly. (由于全校集会，老师提前解散了班级。)
Can we dismiss early today? I have a doctor's appointment. (今天能提前下课吗？我有看医生的预约。)

除了"dismiss"之外，还有一些其他表达方式也可以用来表示学生提前下课：

"End class early" (提前结束课程)
"Leave class early" (提前离开课堂)
"Excuse from class" (允许离开课堂)

例如：

The teacher ended class early because of a schedupng confpct. (由于时间安排冲突，老师提前结束了课程。)
Can I leave class early today? I have an important meeting. (今天我能提前离开课堂吗？我有一个重要的会议。)
I was excused from class early because I wasn't feepng well. (我因为不舒服被允许早早地离开课堂。)