The boy and his heart had become friends, and neither was capable now of betraying the other.
The best advice I can give is just to be yourself and have fun.
数学直觉就像肌肉一样 - 通过锻炼会变得更强大。
眼睛会欺骗人,双腿会累死人,但胃却专给人找麻烦!