white coal
/ˌwʌɪt ˈkəʊl/noun
A source of energy regarded as being cleaner than coal; specifically hydroelectric power.
Origin
Late 17th century (in an earlier sense). From white + coal.
| 单词 | white coal |
| 释义 | white coal/ˌwʌɪt ˈkəʊl/noun A source of energy regarded as being cleaner than coal; specifically hydroelectric power. Origin |
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