每局比赛的第一分球站在中间标志的右边发球，第二次换到左边，第三次又回到右边，如此交替进行。

For the first point of each game, the server stands to the right of the center mark to serve, for the second, to the left, for the third back to the right, and so on alternately.

youdao

每局比赛的第一分球站在中间标志的右边发球，第二次换到左边，第三次又回到右边，如此交替进行。

For the first point of each game, he stands to the right of the center mark to serve. For the second, to the left, for the third back to the right, and so on alternately.

youdao

每局比赛的第一分球站在中间标志的右边发球，第二次换到左边，第三次又回到右边，如此交替进行。

For the first point of each game, he stands to the right of the center mark to serve. For the second, to the left, for the third back to the right, and so on alternately.

youdao