以下为句子列表：
英文: 90 deg. refl. - controls the reflectivity of surfaces perpendicular to the viewer.
中文: 反射控制与视线垂直的表面的反射。
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英文: A cylindrical surface or solid all of whose sections perpendicular to the elements are elliptical.
中文: 椭圆柱与组成要素垂直的所有圆柱形表面或柱体的部分是椭圆形的柱体
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英文: A horizontal axis machine has its blades rotating on an axis parallel to the ground, whereas a vertical axis machine has its blades rotating on an axis perpendicular to the ground.
中文: 水平轴的叶片绕水平向的轴旋转；垂直轴的叶片绕着与地面垂直的轴旋转示。
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英文: Abstract: By means of RDS detection system, slight difference of reflectance coefficients for samples can be measured in two mutually vertical directions on the plane of the sample under approximately perpendicular incident condition, this is known as in-
中文: 文摘:利用RDS测试系统，可以在近垂直入射条件下，测量出样品的反射系数在样品平面内两个互相垂直的方向上的细微差异，即所谓平面内光学各向异性。
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英文: Abstract: The paper probed the analysis on the adding mode of perpendicular load in multistorey building structures,the bending moment of frame side beams and the top,the bending moment of secondary beams,the difference between the tie-beam,plane-frame an
中文: 文摘:讨论了在多项高层建筑结构分析中垂直荷载加载模式的选择，框架边梁和次梁端部的弯矩计算，连梁问题和平面框架分析与空间分析在传力路径上的差别以及单片剪力墙平面外弯矩等问题，可供同类结构内力分析时参考.
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