Defensive players must be outside the center circle, at least 10 yards away from the ball, for the kickoff.

开球时防守一方的球员不得进入中圈（中圈半径10码，即9．15米）。

youdao

Defensive players must be outside the center circle, at least 10 yards away from the ball, for the kickoff.

开球时防守一方的球员不得进入中圈（中圈半径10码，即9．15米）。

youdao