我认为在生活中保持平衡很重要。你不能一直工作；你也必须玩得开心。
I think it's important to have a balance in life. You can't just work all the time; you have to have fun too.
Every lump of coal we mine keeps the lights on in someone's home.
I think frugality drives innovation， just like other constraints do. One of the only ways to get out of a tight box is to invent your way out.
No man's knowledge here can go beyond his experience.