counterweight
n. 平衡的行为(或提议);平衡物; v. 对……起平衡作用,抗衡
n.平衡物,称锤,平衡力
expansible hatting hypomotility inherit polygalaceous sportsmanlike vizagapatam下载迅蛙App
n. 平衡的行为(或提议);平衡物; v. 对……起平衡作用,抗衡
n.平衡物,称锤,平衡力
expansible hatting hypomotility inherit polygalaceous sportsmanlike vizagapatam