blue·stone 
(blstōn′)
(blstōn′)n.
1. A bluish-gray sandstone used for paving and building.
2. A stone similar to this kind of sandstone.
| 单词 | bluestone |
| 释义 | blue·stone (blstōn′)n. 1. A bluish-gray sandstone used for paving and building. 2. A stone similar to this kind of sandstone. |
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