The moonball—a high, heavy topspin shot—drives lots of players crazy.

月亮球即又高又重的超级球，这种球让很多球员抓狂。

Topspin or overspin is when the ball is spinning over itself in the direction moving forward.

许多网球选手对于落球有误会. 我将试着简略阐明一下.

And at the other end, lay one in short – and the point is over, Federer able to flatten it out, or lace it with topspin, the ball exceptionally heavy and often unreturnable.

另一方面，费德勒时常能一致命，这在于他能够出平球或者球，球势格外的沉，令人难以防。