以下为句子列表：
英文: Because the molecules in liquids are so densely packed together , the average time between collisions is a picosecond or less .
中文: 由于液体中的分子很密地积聚在一起，所以，两次碰撞之间的平均时间间隔只有一微微秒或者更短些。
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英文: The machine is stainless steel multilayer frame filter.it is fit for enclosed filter in liquids with concentration ≤ 50%,low viscosity and little slag so as to meet precision filter and half-precision filter requirements like refining,sterilization and cl
中文: 本机为不锈钢多层板框式过滤机，适用于浓度50%以下粘度较低，含渣量较少的液体作密闭过滤以达到提纯，灭菌、澄清等精滤、半精滤的要求，直接选用微孔滤膜，可不经微孔薄膜过滤器过滤可达到无菌过滤之目的。
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