deposition of coal造句

"deposition of coal"是什么意思

造句与例句手机版

Historical deposition of coal ash used for residential, commercial, and industrial heating, as well as for industrial processes such as ore smelting, were a common source of contamination in areas that were industrialized before about 1960.
It's difficult to see deposition of coal in a sentence. 用deposition of coal造句挺难的

相邻词汇

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