Aim To study the synthetic method for the glutaric dialdehyde. 目的研究戊二醛的新合成方法.
The cross - linking reaction between dialdehyde compound and cellulose acetate raises the chemical stability of the material. 通过二醛类与醋酸纤维素类材料的交联反应,提高了材料的化学稳定性.
他被任命为天主教的助祭。He had been ordained as a deacon in the Roman Catholic Church.主教 、 司铎以及助祭列队走进大教堂.The bishops, priests and deacons processed into the cathedral....
对讲机发出嗡嗡声，他按下了相应的开关。The intercom buzzed and he pressed down the appropriate switch.有一次他母亲通过对讲机问他: “ 你在干什么?" What are you doling?'she once demanded over the intercom.海军少将斯普鲁恩斯通过短程无线电对讲机发布一道又一道命令, 表面上总算重新控制了局面.Rear Adm...
They punished the idler as criminals.他们把懒汉作为罪犯来惩罚.No man is the whole of himself; his friends are the rest of him. A young idler, an old beggar.少壮不努力，老大徒伤悲。A young idler, an old beggar。An idle youth, a needy age.少壮不努力，老大...