上课专心听讲，的同学就能花时间少完成作业，上课精神好。常打嗑睡的长时间完成作业，注意力无法集中

Students who listen to teacher carefully can finish their homework in a short time.And they also can enjoy the class.If you feel sleepy during the classtime,you can't study well .Concentrate on the most important things!
加入了一些感情色彩，但是意思绝对是没有变化的

Attends class listens with single-hearted devotion, schoolmate can spend the time little to complete the work, attends class the spirit to be good. Chang Dake rests the long time completes the work, the attention is unable to concentrate

Students who listen to teacher carefully can finish their homework in a short time.And they also can enjoy the class.If you feel sleepy during the classtime,you can't study well .Concentrate on the most important things!

Concentrate on the lecture classes, students will be able to spend less time to complete operations, the spirit of good classes.sleepy often hit the longest time to complete operations, inability to concentrate attention