rock-bottom

n.adj.(价格)最低(的)

roaster, roasting, rob, rob sb. of sth., robber, robbery, robe, robin, Robinson Crusoe, robot, robot-arm, robotic, robotics, robust, robustly, robustness, rock, rock and roll (also ,rock 'n' `roll), rock salmon, rock'n'roll, rock-cake, rock-climbing, rock-crystal, rock-garden, rock-plant, rock-salt, rock-steady, rocker, rockery, rocket, rocketry, rockiness, rocking-chair (also rocker), rocking-horse, rocky, rococo, rod, rode, rodent, rodeo,