子曰：“色厉而内荏，譬诸小人，其犹穿窬之盗也与？”
【译文】 孔子说：“外表威严而内心怯懦的人，用小人作比喻，就象挖墙洞的小偷吧！”
The true revolutionary is guided by a great feeling of love. It is impossible to think of a genuine revolutionary lacking this quality.
Coal will remain part of the energy mix, but its role must be redefined for a cleaner future.
数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。
The past is never dead. It's not even past.