Effect of substitution of compensation valence on dielectric and piezoelectric properties of lead-free piezoelectric ceramics of (Bi_(1/2)Na_(1/2))TiO_3;
补偿电价取代对(Bi_(1/2)Na_(1/2))TiO_3无铅压电陶瓷介电与压电性能的影响
Density Functional Theory Studies on the Substitutional Site of Nitrogen in the Nitrogen-Incorporated ZSM-5 Zeolite;
含氮ZSM-5分子筛骨架中氮取代位置的密度泛函计算
Because the O11 atom located at the Brnsted acid site is one of the most preferred sites for nitrogen substitution,nitridation can decrease the .
利用量子化学中的密度泛函理论,基于ZSM-5分子筛的8T簇模型,在Gaussian 98程序中采用B3LYP方法和6-311G(d,p)基组计算了ZSM-5分子筛中氮的最佳取代位置。
Chloro- hydrin resin and chlorinated rubber have no distinct difference in advantages and disadvantages by comparison; and from the view- point of environment protection, chlorohydrin resin can completely replace chlorinated rubber as binder.
从环保角度来看,氯醚树脂完全可以取代氯化橡胶。
This process saves time and raw material, lowers considerable production cost, achieves good application result, and can replace conventional chlorite bleaching and hydrogen perox.
通过研究氧漂稳定剂TanatexGEO对棉针织物的氧漂特性及过氧化氢酶去除漂白后残余双氧水的机理,开发了使用TanatexGEO等生产特白棉针织物的工艺,可取代传统的亚、氧双漂工艺,省时省料,大幅度降低了生产成本,取得良好的应用效
The high-toxic pesticide in plant protection will be replaced recently in China.
取代高毒农药势在必行。
The dechroming mechanism of organic acid from chrome shavings was studied from the following aspects,the depolymerization of complex compound,the replacement of H+ and the replacement of organic acid radical anion.
从络合物解聚、氢离子取代和有机酸根阴离子取代3个方面,探讨了有机酸的脱铬机理,认为氢离子的取代和有机酸阴离子的取代起主要作用。
This article,on the basis of cold-rolled ribbed steel bars in residential buildings,introduces their characteristics and replacement of ordinary steel bars in pre-stressed unit.
文章从冷轧带肋钢筋在住宅建设上的应用着手,介绍了冷轧带肋钢筋具有特点,在预应力构件中基本取代常用的钢筋。
The community succession and replacement of late Devonian and their correlation in central Hunan are discussed in more details.
本文分析了Li群落和C-H群落的生物组成,分异度,相对丰富度,生活方式及空间分布等特征;讨论了湘中晚泥盆世群落的演替和取代规律及其空间对比,进一步强调了生物与环境的密切关系及其在地层学上的意义。
Study on Synthesis of 2,6-Substitute Purine Derivatives;
嘌呤2，6位取代衍生物的合成
Research on catalytic oxidation of soot over Pt-substituted LaCoO_3
Pt取代的LaCoO_3催化氧化碳烟的研究
DS, D.S. (degree of substitution)
取代度,置换[程]度
Study on the Reaction of α-Carbonyl-N, N-Disubstitued Thioformamides;
N，N-二取代—α—羰基硫代甲酰取代胺的反应研究
Electric light has superseded gas light.
电灯已经取代了煤气灯。
The gas lamp gradually lost ground to electric lighting.
电灯逐步取代了煤气灯.
Has the cinema lost out to TV?
电影已被电视取代了吗?
The sailing ships were superseded by the steamships.
帆船已被汽船所取代。
To assume someone's position or duties.
取代某人的职位或责任
There is no substitute for hard work!
艰苦的锻炼无可取代。
Electric lights have replaced candles.
电灯已经取代了蜡烛。
No, I'm going to have ham and eggs instead.
不, 我要吃火腿和蛋取代。
He was hurt, and another player replaced him.
另一个选手取代了他。
was replaced with the bang of firecrackers.
又被鞭炮声所取代。
The old system has been superseded.
旧制度已被取代了。
He displaced me in Betty's affections.
他取代我赢得贝蒂的爱。
Home-made parts are being substituted for imported ones.
国产零件取代进口零件。
Mongolian people had replaced them.
蒙古人已经取代了他们。
Home-made goods are edging out imported foreign goods.
国产货正在取代进口货。
These were suporseded by hachures.
这些被晕翁线取代。