以下为句子列表：
英文: Results show when velocity of flow remains unchanged in the onflow area and openness of the tube is changed, then resistance coefficient ζ changes obviously.
中文: 实验结果表明：在湍流区域内流速（量）不变时，改变管件开度，阻力系数ζ变化较显著；改变流量，管件开度不变时，ζ变化不大。
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英文: The obstruction that the mere fluid receives while flowing in different medium is different, Make the velocity of flow different too, Cause and refract light the index to be different, And between size and medium molecule of obstruction effort size and me
中文: 摘要光流体在不同介质中流动时所受的阻力不同，使得流速也不同，导致折光指数不同，而阻力的大小与介质分子间作用力大小及介质分子堆积的密集程度有关。
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