常見(jiàn)例句The novel methods and the new chances for coal's nonfuel application are provided by coal based polyaniline.The coal based polyan... 同時(shí),煤基聚苯胺也為煤的非能源利用提供了新途徑和新機(jī)遇,具有一定的推廣價(jià)值。 返回 Polyan