Education between China and US

I have been in US for about four months. Everything goes very well and I have been used to the life here. People are very friendly and helpful. The study life here I think is not difficult for me because I have learned the relative knowledge in my undergraduate. The only thing I feel hard is that the language and words. On the class, I cannot quite understand what teachers talk about. And the technical words are also hard to remember. So as an international student, I think the most difficult thing we have to face is that we must adapt the language as soon as possible. Otherwise, I think education in US is more open than in China. Students on the class are more active and free. They like to ask all kinds of questions and teachers are glad to answer them while in China students usually do that after class.