backspin underspin下旋球
deep backspin急下旋球
Backspin Blow回马
backspin chop削下旋球
fast backspin急下旋
Backspin Billiards旋转台球;转桌球;扭转台球
Backspin Ball缩杆球
backspin service发下旋球
backspin rolls传动托辊
N（名词） a backward spinning motion imparted to a ball to reduce its speed at impact, as by hitting it with a downward or undercutting motion (球的)回旋 [sport] → compare topspin