foul line (foullines)

• 1.  

  N-COUNT（可数名词） In basketball, the foul line is the line from which a player tries to throw the ball through the basket after they have been fouled. (篮球比赛中的)罚球线
• 2.  

  N-COUNT（可数名词） In other sports, the foul lines are the lines that form the boundaries of the playing area. (体育场上划分比赛区域的)边界

  例：

  ...a machine that determines whether a tennis ball has fallen outside the foul line.

  ...一台能裁决网球是否出界的机器。