问题不在于工人效率低下，而在于管理层对他们的需求视而不见。

Coal isn't the problem - how we use it is. The solution lies in cleaner technologies and better utilization.

The only thing you can control is your effort and your attitude.

The only way to do great work is to love what you do.

数学语言是普遍的，超越了文化和语言的障碍。

"The past is always present in the present."

在计算机科学中，我们站在巨人的肩膀上。