stepping-stone的翻译，读音
英/'stepiŋ,stәun/
释义：
n. 踏脚石, 进身之价
n. A stone to raise the feet above the surface of
water or mud in walking.
n. Fig.: A means of progress or advancement.
n. A stone to raise the feet above the surface of
water or mud in walking.
n. Fig.: A means of progress or advancement.