tā / yòng / xià / xuán / xiāo / qiú / gǎi / biàn / jié / zòu / ràng / duì / shǒu / hěn / nán / jiē / zhù

他用下旋削球改变节奏，让对手很难接住。

He changed the pace with an undercut, making it difficult for his opponent to return the ball.