Knowledge is a city to the building of which every human being brought a stone.
知识是一座城堡，每个人都应为它增砖添瓦。
Knowledge is like a treasure, not easy to obtain, must learn, study, think, the most important thing is to have a strong thirst for knowledge.
知识如同珍宝，不是轻易获得的，必须学习、钻研、思考，最重要的是必须有强烈的求知欲。