浩荡离愁白日斜,吟鞭东指即天涯。
离愁浩荡随着夕阳西下,挥鞭东指便是天涯。
The only way to learn mathematics is to do mathematics.
I don't want to be a product of my environment. I want my environment to be a product of me.
质量从来不是偶然的;它始终是智慧努力的结果。
安全不仅仅是一种协议;它是我们必须每天建立的文化。