I was surprised by this. I grew up in a city in China, where I had to wear a face mask every time I went outside, otherwise, I might get sick.

　　我深感意外。我在中国的一个城市长大，从小出门都得戴口罩，否则就会生病。

　　However, the moment I inhaled and exhaled outside the airport.

　　然而，在机场呼吸到这里空气的那一刻。

　　I felt free.

　　我感受到了自由。

　　No more fog on my glasses, no more difficult breathing, no more suppression.

　　我的眼镜上不再有雾，呼吸不再困难，也没有了压抑。

　　Every breath was a delight. As I stand here today, I cannot help, but recall that feeling of freedom.

　　每一口呼吸都是愉悦的。今天我站在这里，仍然忍不住回想起那种自由的感觉。

　　At the University of Maryland, I assume feel another kind of fresh air for which I will be forever grateful — the fresh air of free speech.

　　在马里兰大学，另一种清新的空气也令我感怀不已——言论自由的空气。

　　Before I came to United States, I learned in history class about the Declaration of Independence, but these words had no meaning to me— Life, Liberty and the Pursuit of happiness.

　　来美国之前，我在历史课上学到了独立宣言，但“生命、自由和追寻幸福”这些词句对我而言毫无意义。

　　I was merely memorizing the words to get good grades.

　　我仅仅是背下这些词句以期在考试中取得好成绩。

　　These words sounded so strange, so abstract and so foreign to me, until I came to University of Maryland.

　　这些词句显得那么古怪，那么抽象，那么陌生，直到我来到马里兰大学。

　　I have leaned the right to freely express oneself is sacred in American.

　　我终于明白，言论自由在美国是多么神圣。

　　Each day in Maryland, I was encouraged to express my opinions on controversial issues.

　　在马里兰的每一天，我都被鼓励着在争议问题上表达自己的观点。

　　I could challenge a statement made by my instructor. I could even rate my professors online.

　　我可以质疑自己导师的观点。我甚至可以在网上给我的教授们打分。