| 定期 | dìng qī | at set dates / at regular intervals / periodic / limited to a fixed period of time / fixed term |   |
| 周期性 | zhōu qī xìng | periodic / periodicity (math) / cyclicity | |
| 门捷列夫 | Mén jié liè fū | Dmitri Ivanovich Mendeleev (1834-1907), Russian chemist who introduced the periodic table | |
| 周期表 | zhōu qī biǎo | periodic table (chemistry) / abbr. of 元素週期表|元素周期表[yuan2 su4 zhou1 qi1 biao3], periodic table of the elements | |
| 元素周期表 | yuán sù zhōu qī biǎo | periodic table of the elements (chemistry) | |
| 周期函数 | zhōu qī hán shù | periodic function | |
| 旬课 | xún kè | test every ten day / periodic deadline | |
| 周期数 | zhōu qī shù | periodic number | |
| 周期系 | zhōu qī xì | periodic system / periodicity (chemistry) | |
| 周期解 | zhōu qī jiě | periodic solution (math.) | |
| 普遍定期审议信托基金 | pǔ biàn dìng qī shěn yì xìn tuō jī jīn | Universal Periodic Review Trust Fund | |
| 与审议定期报告有关的议题和问题清单 | | List of issues and questions with regard to the consideration of periodic reports | |
| 普遍定期审议工作组 | pǔ biàn dìng qī shěn yì gōng zuò zǔ | Working Group on the Universal Periodic Review | |
| 关于评价活动的定期报告 | | Periodic Report on Evaluation Activities | |
| 普遍定期审议 | pǔ biàn dìng qī shěn yì | universal periodic review | |
| 定期真正选举 | | periodic and genuine elections | |
| 定向大功率对数周期天线 | | directional high-power log periodic antenna | |
| 普遍定期审议机制工作组 | pǔ biàn dìng qī shěn yì jī zhì gōng zuò zǔ | Inter-sessional open-ended intergovernmental Working Group to develop the modalities of the universal periodic review mechanism / Working group on the universal periodic review mechanism | |
| 定期人权报告委员会 | | Committee on Periodic Reports on Human Rights | |
| 定期给付中的养恤金 | | periodic benefit in payment | |
| 环境法发展和定期审查方桉 | | Programme for the Development and Periodic Review of Environmental Law / Montevideo Programme | |
| 化学工业定期调查专家组 | | Group of Experts on the Periodic Survey of the Chemical Industry | |
| 定期报告 | | periodic report | |
| 定期总结 | | periodic summary | |
| 普遍定期审议股 | | Universal Periodic Review Unit | |
