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It is extracted mainly from bauxite by electrolysis of a molten mixture of purified bauxite and cryolite.

它主要是由萃取铁铝氧化物得到，而铁铝氧化物是电解含有熔溶之纯铁铝氧化物和冰晶石的混合物而得。

Tobacco mosaic virus RNA and Cucumber mosaic virus were extracted and sequenced, respectively.

分别提取烟草普通花叶病和烟草黄瓜花叶病的病毒RNA。

By using this method, the angular frequency, amplitude, initial phase angle, decay constant of each component in transient voltage and/or current waveforms can be precisely extracted. Also, all other kinds of transient procedure can be analyzed by this method. Thirdly, a new definition of generalized instantaneous reactive power and generalized instantaneous reactive current in dq0 coordinates under any nonsinusoidal and unbalanced three-phase circuit is proposed for the first time. The detection and compensation method for different instantaneous reactive currents are also concerned.

本文首先提出了用于快速高精度频谱分析的一种改进快速傅立叶变换方法，该法具有速度快、精度高、抗混迭、不受采样定理约束、可以分析出谐次大于N／2的频谱系数等特点，可方便地应用于电力系统谐波分析及其它各类频谱分析；然后提出了基于非线性最小二乘优化法的电力系统暂态波形分析方法，可准确求出电力系统暂态电压、电流波形中各个分量的角频率、幅值、初相角及衰减常数，并可广泛应用于各类暂态过程波形分析。

The validity of the extracted data is verified by using the synchronous data with the same depth of electric current meter.

利用"六点法"同时、同高度的电磁海流计流速数据对提取出来的ADCP近底流速数据进行验证。

Based on present application status of waste products in curriery in China, the advantages and disadvantages of collagen and analysis and characterization of collagen extracted from hideoffals, studies on collagen application properties and its blend films with one or two polysaccharides were done in this thesis.

本论文基于我国制革废弃物的应用研究现状及胶原蛋白的性能优势与缺点，在减轻制革污染的同时，变废为宝，以高值转化为目的，在对从制革皮边角余料中提取的胶原蛋白进行分析表征的基础上，围绕胶原蛋白的应用特性和共混生物膜材料进行了研究。

They acquired underappreciated or undervalued assets at cut-rate prices, extracted costs and instilled financial discipline.

他们以低价收购未得到充分认可或低估的资产，缩减成本并引入财务纪律。

The fault feature of reciprocating machinery is extracted by CWT in this thesis.

特征提取是往复机械诊断信息提取的核心。

The more the arsenic removed by biooxidation, the more the gold extracted by cyanidation.

细菌脱砷后新生成的α-S°会使氰化钠用量增加，用碱液或石灰水预处理则可降低氰化钠用量。

Based on the analytic method of cyclic spectrum density, the paper pointed out that the impact frequency could be extracted effectively with the help of scanning cyclic frequency domain.

通过对循环谱密度分析方法的特性分析，指出应用循环谱密度分析方法可以在循环频率域有效提取出滚动轴承的冲击故障频率。

Then the corresponding sigma matrix is given to further estimate the beam emittance extracted from electron cyclotron resonance ion source.

然后给出了相应的相椭圆系数矩阵来进一步估算从ECR离子源引出束流的发射度。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失