[mass noun]a coarse felt-like woollen material that is typically green, used for covering billiard and card tables and for aprons (桌球台、牌桌衬面或围裙多为绿色)台面呢
语源
late 16th cent.: from French baies, feminine plural of bai 'chestnut-coloured' (see bay), treated as a singular noun. The name is presumably from the original colour of the cloth, although several colours are recorded