selective oxidation短语¹⁴⁴⁹⁷²⁺² 基本例句 分别氧化,局部氧化 This paper has proposed an effective way to realize the high selectivity for target products by heterogeneously catalyzed selective oxidation employing molecular oxygen as oxidants in liquid phase. 本论文提出采用多相催化剂，以分子氧为氧源，液相条件下的合成路线是提高目标产物选择性的有效途径之一。 cnki