查询词典 surface area

The SBA-15-supported vanadium oxide catalyst has the highest selectivity for propylene because of its larger pore diameter and higher surface area.

SBA-15负载钒氧化物催化剂因具有较大的比表面积和较大的孔径，不仅具有较高的丙烷氧化脱氢催化活性，而且具有较高的丙烯选择性。

The effect of the preparation process on particle size,specific surface area, crystal form and crystalline morphology of the tungsten trioxide was investigated by TEM and XRD etc.

通过激光粒度仪、比表面分析测试仪、TEM、XRD等测试技术对WO3进行表征，研究了制备过程对WO3粒度大小、晶粒形貌、晶型等的影响。

Result showed that the obtained Sb-doped tin oxide nanopowders possessed high specific surface area.

结果表明，采用乙醇超临界流体干燥法可得到高比表面积的掺锑氧化锡纳米粉体。

And having to buy a new shirt every time my body is flattened out to 4,000 times its usual surface area is one more strain on my budget that I don't need.

而且每次我的身体裂变重组膨胀使得外表面平展成原先外表面积的4000倍后不得不购买新的衬衫，这项开支对我的生活预算又是不必要的负担。

With a constant space and different duty ratios, two conditions with high heat transfer performances emerged mainly due to the different degrees of influence of the heat transfer surface area and the rib thickness on the heat exchange performance.

以换热系数进行比较，当占空比为83％左右时，热沉表面温度最低，换热性能最佳；当间距恒定不变而占空比不同时，会出现两个换热性能较好的情况，主要是由于换热表面积和肋片厚度影响换热性能的程度不同。

In printing , the surface area taken up by type of a given size.

在印刷技术中，给定尺寸的铅字所占有的表面积。

Reviews the effect of surface area and thickness of fire loads on predicting the value of the heat release rate .

主要研究可燃物表面积和厚度对估测释热速率的影响。

In the agglomerations, which cover about 20% of the total surface area, the density is 590 per square km (1528 per square mile).

城市聚集的地区约占瑞士总面积的20%，其人口密度为每平方公里590人。

Since the accumulator is one of the most important component with the largest sound radiation surface area in rotary compressor ,its noise contribution may be substantial.

储液器是旋转式压缩机上的一个重要部件，由于它具有较大的声辐射面积，因此它的噪声贡献量不容忽视。

Strong soda lye was added into high calcium pulverized coal ash to prepare improved pulverized coal ash, the result from measurement shows that the bulk density, specific surface area, granulation appearance of pulverized coal ash after improvement were substantially better than that of coal ash before improvement.

摘 要：在高钙粉煤灰中加入强碱液制备了改性粉煤灰，测定结果表明，改性后粉煤灰的堆积密度、比表面积、颗粒形貌等明显优于改性前。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。