你最不满意的客户是你最好的学习资源。

材料的质量反映了品质的质量。

证明的严谨性将数学与所有其他科学区分开来。

I think it's important to keep challenging yourself, to keep growing.

The coal industry is not just about digging rocks; it's about powering lives and fueling progress.

创新是企业持续发展的动力。