The stone steps had been worn smooth.

【smooth，smoothness】石阶被磨得光溜溜的了。

Tickler was a wax-ended piece of cane, worn smooth by collision with my tickled frame.

蒂克勒是一块蜡端的甘蔗， 与我发痒的框架碰撞时穿得光滑。

The great bulls were dancing in the moonlight, leaping in an irregular circle about the flat-topped earthen drum about which three old females sat beating its resounding top with sticks worn smooth by long years of use.

大公牛在月光下跳舞，围着平顶土鼓围着不规则的圆圈跳跃，三位老母牛坐在鼓旁，用长年使用磨得光滑的棍子敲打着响亮的鼓鼓。