I'm very sorry to bother you so late, because I neglected a lot of things that did not work properly, which caused a lot of trouble to you and the teaching assistant. I'm very sorry, I hope you can forgive me. About the work, we are also the first contact in this area. What's not good can be put forward, we will correct it. If you have any comments on the course, you can also. So tell me, I'll give my boss feedback.<br>
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