以下为句子列表：
英文: A few years later he was able to take out his first patents for high-frequency AC generators and transformers.
中文: 数年以后，他就获得了发明高频交流，发电机和变压器的专利—这也是他获得的最初两项专利。
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英文: A kind of high-frequency and high-voltage inverter power supply for electrostatic precipitator (ESP) is introduced.
中文: 摘要介绍了一种电除尘器(ESP)用高频高压逆变电源。
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英文: A series of standard solution made up with standard substance of sodium carbonate, and combusted in a high-frequency induction furnace with pure oxygen, and the amount of total carbon was measured by infrared absorption.
中文: 摘要以碳酸钠为基准物质，配成一系列标准溶液，在通有纯氧气的高频炉中燃烧，红外吸收法测定碳含量，绘制校准曲线，测定矽中总碳量，与推荐值基本一致，方法准确、结果满意。
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英文: Abstract: The high-frequency pulse waveform of WEDM pulse generator was analyzed. Basic condition method is presented the results is well.
中文: 文摘:分析了电火花线切割机脉冲电源的高频脉冲波形，提出了有效的控制方法，获得了良好的综合效果。
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英文: An upper arm artery's ability to relax and expand to accommodate increased blood flow -- known as flow mediated dilation （FMD） -- was measured using high-frequency ultrasound before and after daily cocoa or placebo consumption.
中文: 在每日摄食可可或安慰剂前后，（研究人员）利用高频超音波，对肱动脉因应增加之血流的舒张能力；亦即流量介导扩张（FMD）进行测量。
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