foot fault

英 美
  • n.〈网球〉脚步犯规
  • fault n.缺点;故障;过错;[地]断层v.找...错误
  • foot n.脚;英尺;最底部;音步v.表演舞步;步行;付账;踏;共计
名词 footfault:
  1. a fault that occurs when the server in tennis fails to keep both feet behind the baseline