以下为句子列表：
英文: The average velocity result shows the average magnitude of velocity of the polymer inside the mold cavity over time.
中文: 平均速度?显示塑料在模腔内随时间而变的速度值（平均是指厚度上的平均）。
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英文: The turbulent flow in open channel is tested with laser-Doppler anemometer, in which the longitudinal time average velocity and fluctuating velocity of turbulent flow in open channel under the conditions of the sudden changes of roughnesses at different w
中文: 摘要通过激光测速仪，对壁面糙率突变时的明渠紊流进行试验，测量了糙率突变不同水深情况下明渠紊流的纵向时均流速和脉动流速。
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