基本解释二茂镍同根派生 英汉例句Keywords Metallocene;Catalysts;Chromium complex;Titanium complexes;Constrained Geometry catalysts;Ethylene polymerization;DSC;Nickelocene;Cobaltocene; 茂金属;催化剂;铬类化合物;钛类化合物;限制几何构型催化剂;乙烯聚合;DSC;二茂镍;二茂钴;