n. 踏脚石, 进身之价
在线英汉词典

stepping-stone的短语、例句：

stepping-stone n (a) flat stone (usu one of several) providing a place to step on when crossing a stream, river, etc on foot （过河等用的）踏脚石. (b) (fig 比喻) means or stage of progress towards achieving or attaining sth 藉以达到目标的手段或阶段
a first stepping-stone on the path to success 通向成功的第一步.