以下为句子列表：
英文: Considering the point source requirement, the electric spark which can generate impulse -like signals is employed in this measurement and the near field HRTF data are obtained efficiently.
中文: 为了满足近场情况下“点声源”的要求，本研究提出了电火花冲激点声源的测量方法，成功地获得了近场数据。
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英文: In this paper, the effect of velocity pulse in near field ground motions is emphasized and the influence of velocity pulse to acceleration velocity and displacement in earthquake ground motions is analyzed by using simple impact modal.
中文: 摘要着重介绍了几次地震中出现的近场地震动的速度脉冲特性，并利用简化冲击模型来分析速度脉冲效应对地震动加速度、速度、位移的影响。
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英文: Previous HRTF measurement were lack of near field data.
中文: 以往在实际测量头相关传输函数时，缺乏近场数据。
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英文: The elliptical polarized wave and two types of wave impedance in the near field of current sources of an electric and a magnetic Hertz dipoles combination.
中文: 一赫芝电偶极加上一赫芝磁偶极在近场之椭圆极向波与两种波阻抗。
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英文: The lens—even the lens of the eye—introduces an opportunity for selectivity in image-making, portraying objects in the near field and background with a special kind of de-emphasis: out of focus.
中文: 镜头――即使是人眼里的镜头――在成像时却是有选择性的，近场和背景会以一种特殊的方式进行弱化：失焦。
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