球场等的场线场界 常用于组合 side line 边线对阵开球线对阵开球队员击球手击出平直球区别王牌记分和一般墩牌记分的横线
The field line and field boundary of courts and the like are often used to combine the side line against the tee line against the tee player and the batter to hit a straight ball. It is a horizontal line to distinguish the ace score from the regular header score
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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