1.It turned out that he didn't take full advantage of his skills in using topspin, backspin, and sidespin returns.
结果，他没有充分利用自己在上旋、下旋和侧旋回击方面的优势。
2.This rubbers allow to push a no spin ball and get ANY spin (backspin, topspin, sidespin, even corkscrew).
使用这些胶皮搓一个不转球，出来的可以是下旋，上旋，侧旋等。