发球是比赛的开始，也是一项先发制人的进攻性技术。

Serving is the beginning of a match, also is an item of offensive technology with getting the drop on opponents.

youdao

发球是比赛的开始，也是一项先发制人的进攻性技术。

Serving is the beginning of a match, also is an item of offensive technology with getting the drop on opponents.

youdao