"Friendship isn't about who you've known the longest. It's about who walked into your life and said, 'I'm here for you,' and proved it."
Science moves with the spirit of an adventure, always seeking the unknown.
我从未遇到过一小时阅读不能解除的痛苦。
Today is cruel, tomorrow is crueler, and the day after tomorrow is beautiful, but most people will die tomorrow night, so don't give up today.
学习数学的最好方法就是做数学。