例句與造句

1. Services include the backhand topspin and backspin serves , the forehand topspin and backspin serves , and the high toss service
   發(fā)球方法包括，反手上旋球和下旋球，正手上旋球和下旋球。和高拋發(fā)球。
2. It's difficult to find backspin serve in a sentence. 用backspin serve造句挺難的