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The invention discloses a ternary alloy hyperacoustic motor frictional material of the fire resistance resin modified polyphenyl ester, which solves the low friction coefficient problem, the low impact strength problem, the low abradability problem and the bad processability problem of the prior hyperacoustic motor.

耐高温树脂改性聚苯酯三元合金超声马达摩擦材料，它涉及一种聚苯酯基超声马达的摩擦材料。本发明解决了现有超声马达摩擦材料存在摩擦系数小、冲击强度低、耐磨性能达不到要求，以及加工性能差等缺点。

It requires no prior knowledge of the concepts of algebraic topology or cohomology.

本书的目的是介绍同调代数中最基础性的也是最精彩的内容。

The Publishers shall not reproduce the Proprietors' jacket design of the Work, nor make any use of the proprietors' logo, brands of colophon without the prior written consent of the Proprietors.

未经版权所有者的书面同意，出版者不能复制版权所有者对该作品的封面设计，也不能使用版权所有者的标识、商标或版权页。

Tin, columbite, lead and zinc were also exported, along with gold, and prior to the discovery of oil, the export of solid minerals served as a major foreign exchange earner; at one time, Nigeria was the world's largest exporter of columbite.

在发现石油之前，除了黄金，尼日利亚出口锡、钶铁矿、铅和锌，这些固体矿产的出口为尼日利亚带来了一大笔外汇收入。尼一度曾是世界上最大的钶铁矿出口国。

We met os.popen in the prior chapter; it runs a shell command string and gives us a file object from which we can read the command's output.

我们在上一章见过os.popen，它会运行一个shell命令字符串，并且提供一个文件对象，我们可以从该文件读取命令的输出。

To counteract the evils resulting from the practice of bestowing ecclesiastical benefices upon secular persons in commendam, then rife throughout Western Europe, Dom Didier de la Cour, Prior of the Abbey of St.

为了对付造成的祸害的做法赐予教会benefices后世俗人commendam ，然后充满整个西欧，大教堂迪迪埃德拉鲁阿法院，之前的修道院的圣-瓦纳在洛林，在1598年成立了严格的纪律改革的充分认可的褒义词住持，主教凡尔登。

Each province is governed by a provincial, each commissariate by a commissary general, each of the two congregations by a vicar-general, and every monastery by a prior (though the monastery of Alt-Brunn, in Moravia, is under an abbot) and every college by a rector.

每个省是由各省，每个commissariate由一个小卖部一般来说，每两个教区的副主教，一般，每一个修道院的事先（尽管寺院按住Alt -布吕恩，在摩拉维亚，是根据住持）和每个大学的校长。

In this study,the influence of mass fraction of three common dispersants MC,CMC and HEC on the dispersion of short carbon fibers in water was investigated prior to the manufacture of CFRC.

因此，如何将短切碳纤维均匀分散在水泥基体中成为制备CFRC复合材料的关键[4~6]。

In this study, the influence of mass fraction of three common dispersants MC, CMC and HEC on the dispersion of short carbon fibers in water was investigated prior to the manufacture of CFRC.

碳纤维增强水泥基复合材料已成为一种很有潜力的智能材料，其制备的关键是尽可能将碳纤维均匀分散到水泥基体中，这样才能得到性能优良的CFRC复合材料。

In this study,the influence of mass fraction of three common dispersants MC,CMC(carboxy methyl cellulose sodium) and HEC on the dispersion of short carbon fibers in water was investigated prior to the manufacture of CFRC.

该研究探讨了制备CFRC前期阶段碳纤维分散这一关键环节中，甲基纤维素、羧甲基纤维素钠、羟乙基纤维素3种常用分散剂的质量分数对短碳纤维在其水溶液中分散性的影响；分析了一定温度下分散剂质量分数和溶液黏度的关系；从纤维素结构出发，解释了不同分散剂的分散效果。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷