求翻译：上学期对学习马虎造成成绩下降，这学期我保证上课会认真听讲，不懂就不要装懂，按时完成作业，上课不坐飞机，是什么意思？

Last semester of study results caused by careless drop, I promise this semester classes will carefully listen and understand, do not equipped to understand, timely completion of work, class and do not fly,

Last semester perfunctory performance resulting from the decline in learning this semester, I guarantee that class attendance will be taken seriously, and do not understand what they should not pretend to know what time on a flight school, completion of the operation.

On the semester to studies careless creates the result to drop, this semester I guaranteed attends class can listen earnestly, does not understand do not have to pretend to understand, completes the work on time, does not attend class the take plane,

Last semester on learning decline caused by sloppy, I guarantee class this semester will be listening intently, don't understand the load do not understand, to finish the job, do not sit in class aircraft,

Last semester on learning decline caused by sloppy, I guarantee class this semester will be listening intently, don't understand the load do not understand, to finish the job, do not sit in class aircraft,