常见例句双语例句Using BaCl2·2H2O and urea as raw material, adding control agent, different topography barium carbonate particles were synthesized by homogeneous precipitation method.以二水氯化钡与尿素为原料采用均相沉淀法，通过添加控制剂合成不同形貌的碳酸钡粒子。 返回 BaCl2