... measurement bias 计量偏误 measurement by laser beam 用激光束测量 measurement extrapolation method 外推测量法 ...
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起初，吉林用激光束测量光在这些空气样本中的传播速度。
Originally, Keeling measured the speed of light in the air samples with a laser beam.
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本文给出了用氦氖激光束测量透明板折射率的一种简便方法。
This paper presets a simple method for measuring the refractive index of transparent by beams excited from helium-neon laser.
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