regulator
noun [ C ] uk/ˈreɡ.jə.leɪ.tər/ us/ˈreɡ.jə.leɪ.t̬ɚ/
调节器；校准器；调整器
a device used to control things such as the speed of a clock, the temperature in a room, etc.
管理者;调控者;监管者
an official who makes certain that the companies who operate a system, such as the national electricity supply, work effectively and fairly