"In science, the credit goes to the man who convinces the world, not to the man to whom the idea first occurs."
“拙”可以使人少过错,“缓”可使人免后悔,“退”可远离灾祸,“苟”可使人养福,“静”可使人长寿。
学习某样东西的最好方法就是把它教给别人。