英语语法分析

This backspin makes the ball easier to catch.

后旋球容易接。

You are learning the backhand topspin and backspin serves.

你在学习发反手上旋球和下旋球。

A similar effect occurs with golf balls, which always have "backspin" from impact with the slanted club face.

球棒斜面打击高尔夫球时，常发生“后旋”，就是这种类似效应。