There is some debate over which type of flow is more common on the web.
有一些争论，关于什么类型的“心流”在网上更普遍。
King: Has your definition of flow changed over the years?
King：您对“心流”的定义这些年有变化吗？
The waters of the lake flow out over a large waterfall.
这个湖的流水出后形成了一个大高山流水。
The waters of the lake flow out over a large waterfall.
这个湖的水流出后形成了一个大瀑布。
Two-phase flow is one of the most important subjects in study over the world.
由于螺旋管的广泛应用，螺旋管内两相流动与传热问题成为研究领域的重要课题之一。
The waters of the lake flow out over a large waterfall .
这个湖的水流出后形成了一个大瀑布。
The waters of the lake flow out over a large waterfall .
这个湖的水流出后形成了一个大瀑布。
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