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We also discussed this unusual reaction process and proposed a reasonable "one method,two paths" mechanism.These novel iodine-mediated oxidative cycloadditions provide a rapid and efficient route to the preparation of a variety of spiro dihydrofuran and cyclopropane derivatives.

该反应不使用昂贵的催化剂；反应过程中不使用有毒有害的有机溶剂，对环境友好；反应时间短，收率高；在相同条件下得到不同结构的产物，这提供了一种新型的合成二氢呋喃和环丙烷结构的环化反应。

The configuration and working principle of microwave electron cyclotron resonance plasma source enhanced unbalance magnetron sputtering equipment was introduced, and the process of preparation of diamond-like carbon by this equipment was described.

介绍了微波ECR等离子体源增强非平衡磁控溅射设备的结构和工作原理，详细叙述了利用该设备制备类金刚石膜的过程。

Reporters suggested that I was cynically tacking to the center in preparation for a national race.

报纸记者暗示称我对现状的抨击是为了争取中间路线的选民，为我的全国竞选做准备。

Experimental use of this test method to explore orthogonal extracted from hair cystine in the best conditions, as well as the preparation of melanoma hair capacity.

本次实验运用正交试验法探索从毛发中提取胱氨酸的最佳条件，以及所制取的黑色素的染发能力。

This provides a simple method for large-scale preparation of pure cytochrome c.

因此提供了一个大量制备纯细胞色素c的简单方法。

A fast method for the preparation of cytochrome C of high purity from pig heart is presented.

提出了一种从猪心中快速制备高纯度细胞色素C的方法。

Specimen preparation , a crucial step , is usually properly done if a cytologist is present during the procedure

标本的制备是一个关键的步骤，如果细胞学者在操作现场者则通常由其完成。

Microcells were produced by centrifugation of micronucleated A9 (neo12) cells in Percoll density gradient containing 20 mg/L Cytochalasin B at 39 000 g. The resulting mixture of microcells, whole cells, karyoplasts and cytoplast fragments was filtered through 8 μm and 5 μm size membrane pores sequentially to obtain pure preparation of microcells.

微核化的细胞在含有20 mg/L细胞松弛B的Percoll密度梯度介质中，经39 000g高速离心后，包含微细胞、完整细胞、细胞核和细胞碎片的混合液，依次通过8 μm和5μm孔径的滤膜过滤后可获得纯化的微细胞溶液。

Microcells were produced by centrifugation of micronucleated A9 (neol2) cells in Percoll density gradient containing 20mg/L Cytochalasin B at 39 000g. The resulting mixture of microcells, whole cells, karyoplasts and cytoplast fragments was filtered through 8 pm and 5 pm size membrane pores sequentially to obtain pure preparation of microcells.

微核化的细胞在含有20mg/L细胞松弛B的Percoll密度梯度介质中，经39000g高速离心后，包含微细胞、完整细胞、细胞核和细胞碎片的混合液，依次通过8μm和5μm孔径的滤膜过滤后可获得纯化的微细胞溶液。

The hating-water treatment of expanded perlite and the waterproof measure of products surfaces are designed according to the ply resonance sound absorbing principle. The technical process of the material preparation include mixture, watering and fiber disperse. Through this research, the practical producing parameters are selected, and long dado product line is designed for mass production.

按照薄膜共振吸声原理设计了膨胀珍珠岩的憎水化处理和对制品表面的防水处理措施；通过对搅拌、加水、纤维分散等材料制备工艺过程的研究，确定实际生产技术参数，并为大规模生产设计了长线台座生产线。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。