Coal has been the backbone of industry, and with innovation, it can continue to be.
I don't mind being a role model. I embrace it. I just hope I'm a good one.
——杜先生晚年在香港，先生为中国抗战.赈灾慈善做出巨大贡献，晚年依旧气度过人，毁掉所有欠条。
理论物理学之于数学，犹如雕塑之于大理石块。