这一描述似乎有些类似于前一段的流控制描述。
This description may seem similar to the flow control description in the previous paragraph.
点击这里看一段节选的视频流（54分钟）。
Click here for to see a streaming video of the program itself (54 mins).
在很长的一段时间内，人们对上述流态的了解仅限于定常的或时间平均的流态。
However only steady and mean flow state have been studied for a long period of time.
在很长的一段时间内，人们对上述流态的了解仅限于定常的或时间平均的流态。
However only steady and mean flow state have been studied for a long period of time.
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