stepping
n.
early 14c., verbal noun from step, v.. Stepping stone first recorded early 14c.; in the figurative sense 1650s.
| 词汇 | stepping | 
| 词根词缀 | Online Etymology Dictionary stepping n. early 14c., verbal noun from step, v.. Stepping stone first recorded early 14c.; in the figurative sense 1650s. | 
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