| 单词 | tosca | 
| 释义 | toscanoun  tos·ca   ˈtōskə    plural -s   1   : a calcium carbonate deposit occurring in the loess of the pampas   compare caliche   2   : a soft coral limestone deposit used for various purposes in Puerto Rico (as for masonry, road surfacing, ballast, and as fertilizer)   | 
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