There are four criteria to determine a player's abilities: accuracy, power, spin and serving strength.判断选手能力有四个标准：精准性、爆发力、旋转球技术和发球力量。A baseball thrown with spin is harder to hit.一个掷出的旋转球更难被击中。Have you played twister?你玩过旋转球吗？ She put spin on the ball/shot.她打出了旋转球。