单词是Knowledge，意思是知识，例如：
1、Knowledge cannot replace friendship， I'd rather be an idiot than lose you.知识不能替代友谊，比起失去你，我宁愿做个白痴。
2、Knowledge is a treasure， but practice is the key to it.知识是一宝库，而实践就是开启宝库大门的钥匙。
3、Knowledge is a city to the building of which every human being brought a stone.
