半亩方塘一鉴开，天光云影共徘徊。问渠那得清如许，为有源头活水来。
人文科学

        · There lies a glassy oblong pool,| Where light and shade pursue their course. | How can it be so clear and cool? | For water fresh comes from its source.(Zhu Xi [1130-1200]: “Reflections on Books”)......（本文共 163 字）     [阅读本文] >>