煤烟是燃料不完全燃烧的产物.Soot is the product of the imperfect combustion of fuel.煤烟通常是燃料不完全燃烧的产物.Soot is usually the product of the imperfect combustion of fuel.烟囱里面很快就覆盖了一层煤烟.The inside of a chimney soon gets covered in soot....
The betaine will collapse to the alkene only when these two functions are eclipsed.只有当这两个基团移至重迭位置时碘盐才能裂解为烯烃.Ingredients: Purified water, Cucumber Extract, Hyaluronic Acid Myristic Acid, Cocoamidopropyl Betaine.主要成份: 维他命E...
Somehow he tells these stories without a note of horror.不知为什么他讲这些故事时一点都不害怕。She tells me her troubles. I tell her mine.我和她互相倾诉烦恼。The evidence of our eyes tells us a different story.我们亲眼所见的可不是那么一回事。...
Among the simplest are the lanthanum compounds of the form La?其中最简单的是la? 研问降娘缁0合物.Description: Lanthanum Nitrate is soluble in water and moisture in wet air.说明: 硝酸镧溶于水,在潮湿的空气中易潮解.The extraction mechanism and separation p...