求翻译：他能够积极的参与课堂活动，并且积极地回答问题，有良好的记忆能力。但是，他缺乏必要的努力。如果想要提高成绩，需要提交所有的作业，在考试前做好必要的准备。是什么意思？

He was able to actively participate in classroom activities, and actively answer questions, have a good memory. However, he lacks the necessary effort. If you want to improve performance, all operations required to submit, before the exam make the necessary preparations.

He will be able to active participation in classroom activities, and actively to answer questions, and have a good memory capacity. However, he lacked the necessary efforts. If you want to improve performance, need to be submitted to all the operations before the examination, make the necessary prep

He can the positive participation classroom activity, and answers the question positively, has the good memory ability.But, he lacks the essential endeavor.If wants to enhance the result, needs to submit all works, prepares for essential before the test.

He was able to actively participate in classroom activities, and actively answer the questions, and a good memory. However, he lacked the necessary effort. If you want to improve your score, you need to submit all jobs, make necessary preparations before the exam.

The participation classroom activity that he can be positive, and answer the question actively, there are good memory abilities. However, he lacks the necessary efforts. If want to improve the score, need to submit all homework, make necessary preparations before the examination.