凯特已经邀请了艾伦和她一起过逾越节。Kate had invited Alan to spend the Passover with her.犹太人的宗教节日逾越节昨晚开始了。The Jewish feast of Passover began last night.基督教的圣周与犹太教逾越节的头几天重叠。Christian holy week overlaps with the beginning of the Jewish holi...
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...