3.The catalysts on studying can divide into two kinds: the transition metal bifunctional catalysts and the nitride, carbide and oxycarbide catalysts of transition metals.
目前,正丁烷构催可以分为两类,过渡金属双功能催和过渡金属氮物、碳物和碳氧物催。
4.Background : Bendamustine, a bifunctional alkylating agent with anticipated purin-like properties is active in metastatic breast cancer (MBC) patients.