“semibright coal”的概念、定义、翻译、参考文献-科学参考

单词	semibright coal
释义	semibright coal [`sem·i´brīt `kōl] ^GEOLOGY A type of banded coal defined microscopically as consisting of between 80 and 61% bright ingredients such as vitrain, clarain, and fusain, with clarodurain and durain composing the remainder.
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