The whole Argentine Civil Code is in a straightline of the Roman law. Moreover, the contributions made by Spanish and French laws are in some way Roman law.
This paper, based on the straight-line transmitting law and refraction law of light, analysed the conditions that the image of object in water will be clearly observed.
本文根据光的直线传波规律和折射定律，分析了观察水中物体成清晰像的条件。
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This law can be used to establish every field of the regression equation of straightline.