the weathering coal的用法和樣例：
例句
- This article presents the production of the foliage fertilizers of humic acid from weathered coals and its application.
介紹以貴州風化煤為原料，生產腐植酸多元複合肥的生產方法及應用前景。 - Thebinder of humic acid sodium obtained from wethering coal is used for briquetting fine coke producing on the vertical oven.
本文介紹了從風化煤中提取腐植酸鈉作粘結劑用於直立爐粉焦成型制氣。
