基本解释[化] 偶磷同根派生 英汉例句Studies on Synthesis and Fungicidal Activities of Asymmetric Phosphoro(-no)thioates Containing Substituted Pyridine 含取代吡啶基的不对称硫代磷(膦)酸酯的合成及杀菌活性研究phosphoro organic insecticide 磷 有机杀虫剂phosphoro group 偶磷基