DICT.TW Dictionary Taiwan

 step·ping-stone /ˈstɛpɪŋˌston/
 踏腳石,方法,手段

 Step·ping-stone n.
 1. A stone to raise the feet above the surface of water or mud in walking.
 2. Fig.: A means of progress or advancement.
    These obstacles his genius had turned into stepping-stones.   --Macaulay.
 That men may rise on stepping-stones
 Of their dead selves to higher things.   --Tennyson.
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