step·ping·stone 
(stĕpĭng-stōn′)
(stĕpĭng-stōn′)n.
1. A stone that provides a place to step, as in crossing a stream.
2. An advantageous position for advancement toward a goal.
| 单词 | steppingstone |
| 释义 | step·ping·stone (stĕpĭng-stōn′)n. 1. A stone that provides a place to step, as in crossing a stream. 2. An advantageous position for advancement toward a goal. |
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