调整 tiáozhěng HSK3 adjust Origin Definitions Defs Strokes Stroke Words Sentences Sents 浮力调整背心 fúlìtiáozhěngbèixīn BCD buoyancy control device used in scuba diving to maintain neutral buoyancy浮力调整装置 fúlìtiáozhěngzhuāngzhì BCD A piece of diving equipment used by scuba divers to control their buoyancy underwater, also known as a Buoyancy Compensation Device.