- 氯 nounchlorinechlorine (element Cl); a toxic, yellow-green gas with a strong odor used for bleaching and disinfecting
- 磷 nounphosphorusthe nonmetallic chemical element with the symbol P; a solid element that exists in several forms such as white, red, and black phosphorus
- 定 verbto decideto fix; to set; to determine; to reach a decision