私下批评，公开表扬。

译文：矮板凳坐着，才能学业有进，美好的光阴不要错过。赏析：要想获得知识，学有所成，我们必须要能忍受读书学习的寂寞和孤独。读书学习绝非一日之功，需要日积月累，需要持之以恒。

The world is a comedy to the wise, a tragedy to the foolish.

化学的乐趣在于实践，而不仅仅是发现。

Coal mining is a partnership between the earth and human ingenuity.

"We live in time—it holds us and moulds us—but I’ve never felt I understood it very well."

当面临挑战时，专注于解决方案而不是问题。