查询词典 substitution method

In this paper, the world production of PUR industry is described,including raw material, production and consumption of PUR,technical advances of PU foam,such as chlorofluorocarbon substitution technologies, flame retardant PU foams and Polyurethane Reaction Injection Molding and development of domestic polyurethane industry.

本文叙述世界聚氨酯工业生产概况，包括聚氨酯原材料以及聚氨酯产品的生产和消费情况；聚氨酯泡沫塑料技术进展，如氯氟烃替代技术，阻燃聚氨酯泡沫塑料和聚氨酯反应注射成型，以及国内聚氨酯工业的发展概况。

1 With chromosome number 2n=42 allcontained a pair of alien chromosomes, they were substitution lines.

利用分布于小麦染色体上的240对SSR引物对两个亲本莱州953和高大山羊草进行了多态性检测。

In a sentence such as There are now several Jews on the council, which is unexceptionable, the substitution of a circumlocution like Jewish people or persons of Jewish background may unwittingly suggest an unwarranted and hence suspect delicacy.

例这句话在现在的内阁里有一些犹太人就是无懈可击的，一种迂回的替换说法象犹太人或有犹太背景的人可以无意之中表明这只是一个未证实的事，因此只是一种微妙的猜测

Effect of the ratio of chitosan to citral,reaction time and temperature on the yield and the degree of substitution has been investigated.

采用[L9（33）]正交实验探讨了反应时间、反应温度及反应物配比对壳聚糖席夫碱缩合率和取代度的影响。

I switched from 8 to run on behalf of MT in the first 86 laps run, and I can skilled MT substitution in 9 of 7 file blacklist beat Mercedes CLK 500, the use of two or three hours.

从我开着8代MT的86跑第一圈算起，到我可以熟练的在9代用MT的7档梅塞德斯 CLK 500击败黑名单为止，用了两、三个小时。

And then Huaibei should have taken the new coalification industry of energy conversion and raw-material substitution as market development direction to develop ...

最后，就淮北发展煤化工需要重点关注的几个问题如淮水北调、资金筹措、煤化工技术、循环经济进行了深入探讨。

The relationship between stiffness coefficient and prestress degree of ring section is established by substitution prestress degree based on stress ratio for crack factor from China design code.

由于高耸结构在外荷载作用下处于压弯状态，因此本文基于应力比定义预应力度，以应力比预应力度替代规范中的弯矩开裂系数，建立了环形截面刚度系数和预应力度的关系。

Due to the above mentioned reasons, it is therefore assumed that firm resources and capabilities can, in principle, 'contribute to competitive advantage, and can be immune to the factor market threats of imitation, substitution, dissipation, and appropriation' Collis, 1994, p.

因为上述各种原因，因此可以假定企业资源与能力能够在大体上"对竞争优势产生贡献，并能免受要素市场上模仿、替代、损耗和剽窃的威胁"（柯林斯，1994，第146页）。

About his substitution in the Belgrade match he said:'I would have liked to stay on but complaining would have been stupid after I had scored four goals in the last two games… I agree with Del Piero, when he says that this compact group was born after the World Cup.

关于自己在贝尔格莱德的比赛中被替换下场，他说："我希望留在场上，但当我在两场比赛中取得四个进球之后，抱怨本来就是愚蠢的……我同意德尔·皮耶罗说过的话：世界杯之后诞生了这个紧密团结的集体。"

The suitable synthesis conditions of those new products have been studied. The structures of them are affirmed by IR spectroscopy, 1~H NMR,(13)~C NMR and Elemental Analysis;the configurations of them are also analyzed by theoretical calculation of quantum chemistry. Influences of the length of hydrophobic group, the degree of substitution on the solubility, surface activity, emulsifying property, foam property, hygroscopicity and humidity-retaining ability, compatibleness of those new products have been studied in detail.

探讨了各反应产物的适宜合成条件，并利用红外吸收光谱、1~H、(13~C核磁共振、元素分析等仪器分析手段和量子化学从头算STO-3G对所得产物的结构进行了表征；同时较详细地研究了疏水基碳链长度、反应取代度对合成产物的溶解性、表面活性、乳化性、泡沫性、吸湿保湿性和配伍性等物化性质和应用性能的影响规律。

You'll be in trouble it you don't watch out .

如果你不注意，你会有麻烦的。

Shaped like a biconvex lens.Of, relating to, or having the form of a hyperbola.

双曲线的属于双曲线的，与之有关的，或有双曲线形状的