a soft sandstone used for scrubbing the decks of a ship
动词 holystone:
scrub with a holystone
holystone详细解释
ho.ly.stone n.(名词)A piece of soft sandstone used for scouring the wooden decks of a ship.磨甲板沙石:打磨木质甲板用的软沙石v.tr.(及物动词)ho.ly.stoned,ho.ly.ston.ing,ho.ly.stones To scrub or scour with a piece of soft sandstone.用沙石磨 来源:[Origin unknown] [出处不知]