• 基礎釋義
• 例句

• This paper discussed three methods of producting vinyl etherspreparation from acetylene, dehydrohalogenation and acetals. 論述了乙烯基醚類化合物的三種主要制備方法乙炔法 、 脫鹵化氫法和縮醛熱分解法.
• The hydroxyl groups can be changed into esters , ethers , acetals and ketals, etc. 最常用的羥基保護基可歸納為三類:酯類 、 醚類和縮醛或縮酮類.
• Eight acetals ( Ketals ) were synthesized under the optimal conditions. 在最佳條件下,合成了八個縮醛 ( 酮 ) 化合物.
• The yields of other cyclic acetals were between 62. 并在此條件下合成了多種環縮醛,收率62.