【机械工程】燃烧调节、燃烧装置【机械工程】燃烧调节，燃烧设备

down-regulating；down-regulation

CFR（CODE OF FEDERAL REGULATION）

lung holds the office of assistant; it is responsible for management and regulation

down regulation【生理】

feedback regulation

regulate endocrine function; regulation of endocrine function

individual (personal) income regulation tax

adjustment of eccentricity (regulation of eccentricity)