Sodium ethylate was used as catalyst in Baker - Venkataraman of cyclization, and all factors were studied.环合反应采用乙醇钠作为Baker-Venkataraman重排反应的催化剂, 研究了影响反应的各个因素....
We're trying to establish linkages between these groups and financial institutions.我们正努力在这些团体和金融机构之间建立联系。Only the thermosetting resins provide a strong cohesive forces; this is due to molecular cross linkages.只有热固性树...
一位丹麦思想家曾说过,我们的生活是向前的, 但是我们的认识却是向后的.We live forwards, a Danish thinker has said, but we understand backwards.这样补偿了当激波产生时升力向后的运动.This compensates backward movement of the lift forces as shock waves develop.运动员以向前的姿势起跳,向上、向...