基本解释柱硼镁石同根派生 pinnoite相关词英汉例句According to the characteristics of pinnoite in Dachaidan, a new technology of preparing boric acid with two-step sulfuric acid method was studied.摘要针对大柴旦柱硼镁石矿特点，对酸法制硼酸进行了工艺优化研究。pinnoite更多例句