Zi ran ke xue shu mu xue/ Yi kan ke xue shu ji kao lüe/ Zi ran ke xue gai lun/ Zou xiang ke xue de mei xue/ Zi ran ke xue shi Zi ran ke xue li lun Zhong xue shu xue/ He zi yi xue ji shu xue/ Li san shu xue/ Shi yong chu mu xue/