以下为句子列表：
英文: The sources of error in the experiment of measuring wavelength and grating constant with diffraction grating are analysed. The improving method and theory base are also provided.
中文: 摘要分析了用透射光栅测波长和光栅常量的实验中，某些因素对测量结果精确度的影响，并提出了提高测量精确度的方法和依据。
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