常見例句雙語例句Using barium hydroxide octahydrate and urea as raw material, barium carbonate is prepared by homogeneous precipitation method.以八水氫氧化鋇和尿素爲(wèi)原料，採(cǎi)用均相沉澱法制備了碳酸鋇粉躰。 返回 barium octahydrate