(a) Building a board grooved to receive the ends of the steps in a staircase; †(b) a notched board placed in a channel to impede the flow of water…
| 单词 | θ3347 | 
| 释义 | the world > the earth > water > lake > pool > 			[noun]		 > artificially confined water > contrivance for impounding water > board with notches (1)		 notch-board1823 (a) Building a board grooved to receive the ends of the steps in a staircase; †(b) a notched board placed in a channel to impede the flow of water… | 
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