| 科学 | kē xué | science / scientific knowledge / scientific / rational / CL:門|门[men2],個|个[ge4],種|种[zhong3] |   |
| 合理 | hé lǐ | rational / reasonable / fair | |
| 理智 | lǐ zhì | reason / intellect / rationality / rational | |
| 理性 | lǐ xìng | reason / rationality / rational | |
| 有理 | yǒu lǐ | reasonable / justified / right / (math.) rational | |
| 顺理成章 | shùn lǐ chéng zhāng | logical / only to be expected / rational and clearly structured (of text) | |
| 道学 | dào xué | Confucian study of ethics / study of Daoism / school for Daoism in Tang and Song times / Daoist magic / another name for 理學|理学, rational learning of Song dynasty neo-Confucianism | |
| 理性认识 | lǐ xìng rèn shi | cognition / rational knowledge | |
| 有理数 | yǒu lǐ shù | rational number (i.e. fraction of two integers, math.) | |
| 格物 | gé wù | to study the underlying principles, esp. in neo-Confucian rational learning 理學|理学[li3 xue2] / word for Western natural sciences during late Qing | |
| 循环节 | xún huán jié | recurring section of a rational decimal | |
| 有理数域 | yǒu lǐ shù yù | field of rational numbers (math.), usually denoted by Q | |
| 有理数集 | yǒu lǐ shù jí | set of rational numbers (math.) | |
| 理性知识 | lǐ xìng zhī shi | rational knowledge | |
| 生态上合理的废物管理 | | ecologically rational waste management | |
| 合理使用能源奖励制度 | hé lǐ shǐ yòng néng yuán jiǎng lì zhì duó | Incentive System for the Rational Use of Energy System of Incentives for the Rational Use of Energy on a Regional Basis | |
| 莫斯科宣言 | mò sī kē xuān yán | Declaration on Principles of Rational Exploitation of the Living Resources of the Seas and Oceans in the Common Interests of All Peoples of the World | |
| 综合植物保护与合理使用农药专题讨论会 | | Symposium on Integrated Crop Protection and Rational Use of Pesticides in Agriculture | |
| 合理用电和主要城区外电力分配专家组 | | Group of Experts on the Rational Use of Electricity and Electricity Distribution Outside the Major Urban Areas | |
| 合理使用抗生素咨询小组 | | Advisory Group on the Rational Use of Antibiotics | |
| 合理使用药物专家会议 | | Conference of Experts on the Rational Use of Drugs | |
| 环境保护和合理利用自然资源长期战略 | | Long-term Strategy for Environmental Protection and Rational Use of Natural Resources | |
| 有理式 | yǒu lǐ shì | rational expression (math.) | |
| 理中客 | lǐ zhōng kè | rational, neutral, objective (abbr. for 理性、中立、客觀|理性、中立、客观[li3 xing4 , zhong1 li4 , ke4 guan1]) | |
