today i meet the teacher who taught me multivariable calculus. maybe i need to be better then he will think me as a good boy. he is really good. he just think i"m a normal person and at that time he think he is helping me maybe not because he thinks I was a good boy and treated me as a good student. then he realized that I'm not good. but i studied two years in year 2 and he thinks that I'm not good at it.that's not a good news.

to communicate with others and don't make others feel uncomfortable is not easy. just talk to others and then is ok, but talk what? I will find it. just stopped here.