背心 bèixīn HSK6 vest Origin Definitions Defs Strokes Stroke Words Sentences Sents 吊带背心 diàodàibèixīn camisole camisole (women's garment)汗背心 hànbèixīn undershirt tank top or sleeveless undershirt浮力调整背心 fúlìtiáozhěngbèixīn BCD buoyancy control device used in scuba diving to maintain neutral buoyancy