base line ball

• 底线球

base line ball的用法和样例：

例句

1. Whether it was a flat ball down the line or a heavy topspin angle shot, I was able to go after each shot with confidence because of the control I was getting.
   无论是要打出平击的底线球还是强烈旋转的大角度的回球，我都能自信的击出，因为它的控制是如此的惊人。