field of play
noun [ C usually singular ] uk/ˌfiːld əv ˈpleɪ/ us/ˌfiːld əv ˈpleɪ/
（足球或橄榄球的）比赛场地
the part of a football or rugby pitch inside the white lines, on which the game is played
The field of play must be marked with distinctive white lines. 比赛场地必须用白线清楚地标出。