三年前，我带着沮丧的心情来到了大学，但是我现在很高兴了，首先，我已经交了很多朋友，包括我的老师。我们一起分享成功、一起解决问题。再者，我参加了数学建模，我学会了怎样思考和怎样分析问题，第三，我发现了我的兴趣所在。

三年前，我带着沮丧的心情来到了大学，但是我现在很高兴了，首先，我已经交了很多朋友，包括我的老师。我们一起分享成功、一起解决问题。再者，我参加了数学建模，我学会了怎样思考和怎样分析问题，第三，我发现了我的兴趣所在。
Three years ago, I entered the university, disappointed and without hope. But now all has changed for me. I am so happy now,. First, I have made many friends, including my teachers. We share success and solve problems together. Second, I took part in Mathematical Modeling, I learned how to think and how to analysis a question. Third, I finally find where my interest locates.