在数学中,提出问题的艺术必须比解决问题更有价值。
大多数人过着一种平静的绝望生活,他们心中的歌和他们一起埋入坟墓。
The most valuable resource in the world is not oil—it's human potential.
Innovation is the key to the future of coal industry, we must embrace new technologies and ideas.
In order to write about life first you must live it.