It was prepared by the reaction of 12 H - dibenzo [ d , g ] [ 1,3 ] dioxocin - 6 - carboxylic acid with acetoxime.由二苯并-1,3-二氧杂 - 环辛烷 -2- 羧酸经两步反应制得, 总收率70%....
The bead is put on the forehead of the dead shepherd ahead of the herd.珠子被戴在畜群前面的死牧羊人的前额上。She accidentally swallowed a glass bead.她不小心吞下了一颗玻璃珠.Glass bead gels need not be hydrated prior to use.玻璃珠凝胶在使用之前不需要水化....a multic...
They are trained nutritionists who can give sound advice on diets...他们都是受过训练的营养学家，能够在饮食方面提出合理的建议。The general approach commonly adopted by most nutritionists is to measure the energy content.被大多数营养学家所普遍采用的一般方法是去测定能量含量.The...