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Based on detailedly analyzing the application and development of plastic heat exchangers at home and abroad, one approach was advanced that by substituting plastic heat exchanger made of thin wall and canaliculus PTFE plastic tube for the metal heat exchanger of traditional lithium bromide absorption cooler.

本文在对国内外塑料换热器的应用、发展进行详尽分析的基础上，提出采用薄壁小管径聚四氟乙烯塑料管制成的塑料换热器代替传统的溴化锂吸收式制冷机中的金属换热器，制作一台塑料管溴化锂吸收式制冷机及其实验系统的课题。

On the basis of characteristic analysis on all kinds of mineral tailings of copper lead zinc, mineral tailings was classifying according to its application. At the same time, the calcining experiment for twenty material prescriptions of the mineral tailings substituting the clunch or mineralizer mixed with different grades of limestone was actualized in the laboratory's heating kiln under the different temperature. After the fCaO analysis and the X-diffraction test to the calcined samples, the reasonable prescriptions and optimal calcining condition were put forward for different kinds of mineral tailings used to substitute the clunch or mineralizer, the research conclusion offers the instructional reference for the large-scale industrialization production.

同时，对尾矿用于代粘土和矿化剂配不同品位石灰石的20个生料配方进行了实验室高温炉不同温度下的煅烧试验，并对煅烧后的熟料样品进行了游离CaO和X衍射分析，得出了不同尾矿用于代粘土或矿化剂的合理配方和煅烧工况，从而为大规模产业化利用提供指导性参考依据。

Rational polynomial coefficient in the Rational domain can not be the judge about substituting mathematical theorem is the most important issue.

有理系数多项式在有理数域上不可约的判定定理是代数学中的重要问题。

In the production of biodiesel from cottonseed oil by chemical method, the refining process was improved by substituting adsorption treatment for washing and drying.

以棉籽油为原料，探讨了化学法制取生物柴油过程中以吸附剂处理替代水洗干燥的精制工艺。

The fourth part of this work was to enhance the RIE resistance of the photoresist by substituting the cycloolefin structure for the acrylate structure.

第四部份延伸第三部份之脱水交联反应机制於环烯类负型树脂，并验证环烯类光阻剂具有较压克力光阻剂更优秀的抗蚀刻能力。

Substituting Stephen for Bloom Stoom would have passed successively through a dame's school and the high school.

153倘若斯蒂芬与布卢姆换个位置，斯图姆就会顺序从幼儿学校起念完高中。

The above keyboard technique can also be used to delete rows or columns by substituting the Alt+Insert keystroke combination in Step 2 with Alt+Delete .

上面的键盘操作也可以用来删除行或列，以 Alt+Delete 按键组合代替上面第2步的 Alt+Insert 按键组合即可。

A certain habit of antagonism defaced his earlier writings, a trick of rhetoric not quite outgrown in his later, of substituting for the obvious word and thought its diametrical opposite.

他有某种否定自己早期作品的习惯，----一种修辞把戏，在他后期作品中还没有泛滥，置换上明显的词汇可又觉得它有相反纵深。

Three kinds of plant expressing vector pC1304- CamV35S+ Cbcor15b, pC1304-cold-induced promotor+ Cbcor15b*, pC1304- CamV35S+ Cbcbf for transforming dicotyledon plants was constructed successfully by substituting the report gene of pC1304 with the coding sequence of our destination gene. The recombinant vector was introduced into Agrobacterium tumefaciens with freeze-thaw method. The leaf discs of tobacco plants infected by A. tumefaciens were selected with hygromycin. The regenerated plants were tested by PCR.

在成功的构建pC1304- CamV35S+Cbcor15b，pC1304-冷诱导启动子+Cbcor15b*，pC1304- CamV35S+ Cbcbf三种植物表达载体之后，采用冻融法成功地将重组质粒转化到了根癌农杆菌菌株EHA105中，采用农杆菌介导的烟草叶盘转化法，将荠菜Cbcor15b，Cbcor15b*，Cbcbf，转入模式植物烟草中，在诱导生根后对转基因苗进行了PCR检测。

Also, try substituting the 1-1/2 ounces of cola with a diet cola.

同时，试着用不含糖可乐代替1到1/2盎司的可乐。

What was it that made you want to change sider ?

是什么使你临阵倒戈？

I don't know what he wants, but let's play along with him.

我不知道他要干什么，可我