Mathematics is a living subject, constantly evolving and growing.
人生苦短,何必在意别人的看法。
I never wanted to be a star. I just wanted to make music.
【译文】 孔子说:“将知识默记在心,学习时,不感到满足;教人时,不感到疲倦,对我来说没什么问题。”
煤炭行业要坚定不移地走安全高效、清洁低碳的发展道路。