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...
Juanita: What about those glass things? They're pretty. Can I hold one?朱: 这些玻璃的东西 呢? 他们很漂亮.One may hold one's tongue in an ill time.时辰不利休开口.The Saudis hold one - fourth of the world proven oil reserves.沙特拥有全世界石...
婴儿只能接受感官方面的印象, 而不能理解.A baby can only receive sense impressions, but it can not understand them.“鸦片”是一种刺激性的、能引起感官快感的香料，能使你所有的感官兴奋起来。"Opium" is a provocative, sensual, and voluptuous fragrance which makes all your senses v...