马第尼斯发球的时候，经常踩在底线上。

Martinez, when she served, usually stayed on the baseline.

《柯林斯英汉双解大词典》

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.

youdao

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 .

youdao