正因为我的底线打得出色，所以才让你们认为我的发球比以前有了进步。
I am playing very well from the baseline. That seems like my service is better.
发球时，发球者不是站在球场的底线外，而是站在自己的发球区内。
It is not taken from the baseline but from the servere's own service court .
发球时，发球者不是站在球场的底线外，而是站在自己的发球区内。
It is not taken from the baseline but from the servere's own service court .
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