Sustainable development requires balancing economic growth with ecological protection.
馬氏社會主義始終對觀念史學家有意義——一種如此不合邏輯，如此呆板的教條如何能夠?qū)θ说乃枷胍约巴ㄟ^它們而來的歷史事件施加如此強力而持久的影響?！斗湃巫杂傻慕K結(jié)》
The unity of mathematics is not imposed but discovered.
上帝已死。
"Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful."