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....
温斯顿·丘吉尔在1945年的大选中被击败。In 1945, Winston Churchill was defeated at the polls.“某些人钱多但无头脑，”温斯顿曾经评论道。"Some people have more money than sense," Winston had remarked.温斯顿怎么也学不会看路标。Winston could not have read the road signs to sav...
用于干性皮肤的产品含酒精较少或不含酒精。Products for dry skin have little or no alcohol.生活条件改善就会有较多的活产,较少的死产.Better living conditions mean more live births and fewer stillbirths.他们不得不经常设法应付较少的利润额.They have always had to make do with relativ...