代用

The iodination of fluorinated ylide-anions using element iodine or 1,2-diiodoethane wassuccessfully underwent and a series of of perfluoroalkylated α-iodo-α,β-unbsaturated nitriles were prepared.

成功地进行了含氟叶立德阴离子的碘化反应，通过用不同的碘化试剂即单质碘或〓， 2-二碘乙烷制备了一系列全氟烷基化的α—碘代—α，β-不饱和腈。

The iodonium compound could be converted to the chloride, colorless needles, m.p.

用鹼性高錳酸鉀溶液氧化化合物Ⅲ_a得2-碘代-4-硝基苯甲酸。

The yield of keto isophorone was over 94% under optimum conditions.

研究了以β-异佛尔酮为原料，在催化剂存在下，用分子氧氧化制备酮代异佛尔酮的合成工艺。

Therefore, this paper selected the direct oxidation route to synthesize α-isophorone, and according to the principles of green chemistry, oxygen was used as the oxidant, with non-metal N-hydroxy-phthalimide as catalyst, for preparation of Isophorone.

因此本论文的研究选用以α-异佛尔酮直接氧化的路线，且根据绿色化学的原则，以氧气为氧化剂，用一种无金属参与的N–羟基邻苯二甲酰亚胺为催化剂催化α-异佛尔酮，为氧代异佛尔酮的制备提供一条全新的途径。

Although for is a looping construct, the way it works is by binding successive elements of an iterable object to a name.

虽然 for 是用来建立循环的，不过它是通过将一个可迭代对象中的连续元素不断绑定到一个名字来实现的。

Although 'for' is a looping construct, the way it works is by binding successive elements of an iterable object to a name.

虽然 for 是用来建立循环的，但实际上它是通过将一个可迭代对象中的连续元素不断绑定到一个名字来实现的。

Although 'for' is a looping construct, the way it works is by binding successive elements of an iterable object to a name. The following constructs are equivalent

虽然 'for'是用来建立循环的，不过它工作的方式是通过将一个可迭代对象中的连续元素绑定到一个名字在当前名字空间中

If the target list is a comma-separated list of targets: The object must be an iterable with the same number of items as there are targets in the target list, and the items are assigned, from left to right, to the corresponding targets.

如果target list是一组用逗号分隔的目标，该对象必须是可迭代的，并且其子项个数与target list中的目标个数相同。这个对象的子项从左到右地逐个赋予对应target。

We divide the evolution of becoming rocks into four periods: early region's metamorphic process and mixed lithifaction,sedimentation and becoming rocks process in middle and late Proterozonic Era and in the Paleozonic Era,trasformation process of burial hill layers in earth shell'uplift period in the Mesozonic Era, and transformation process to burial hill in the Cenozonic Era.

将储层的成岩演化划分为四个阶段：即早期区域变质作用和混合岩化作用、中晚元古代和古生代沉积成岩作用、中生代地壳抬升阶段潜山地层的改造作用和新生代断裂对潜山的改造作用。

Objective: To develop a GC-MS method for the determination of pseudo-ephedrine in human plasma and study the mutative rules of the pharmacokinetic parameters of the pseudo-ephedrine in different compositions. Method: Orthogonal design was used to determine 8 compositions from Mahuang decoction.

中文摘要：目的：以君药效应成分伪麻黄碱(pseudo-ephedrine，PE)为指标，用GC-MS法考察不同配伍对PE药代学参数的影响规律，探索麻黄汤方中臣佐使药对君药人体内过程的影响。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐