有些人一听到正手击球的力量,(?)集中到持拍手上。但实际上,非持拍手臂在其中起着很重要的作用。职业进而成高水平运动员都会让左臂参与到击球动作之中,而一般的业余选手击球动作中左臂的参与率则要低很多。 As soon as some people hear the power of forehand, (?) Focus on the clapped hands. But in fact, non-holding arm plays a very important role. Occupation and then into a high level athlete will make the left arm involved in the batting action, while the average amateur player hit the left arm in the lower participation rate will be much lower.