My favorite is swinging the arm to swing the racket, which is the cart pushing the horse.
我最喜欢的一个说法是挥动手臂来挥动球拍，就像是马车在推动马。
youdao
Elasticity of the ball depend on the swing of racket.
网球的弹性主要靠主动挥拍。
应用推荐
模块上移
模块下移
不移动