It is a pleasure to see the shape of flow glass by closer observation.

细细的观察，体会出它变化流动的乐趣。

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They occur in separate zones in a complex glass flow driven by high temperatures.

在高温驱动的复杂玻璃流中，它们出现在不同的区域。

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If the glass were kept hot enough, it would flow over the molten tin until the top surface was also flat, horizontal and perfectly parallel to the bottom surface.

如果玻璃保持足够的温度，它就会在熔化的锡中流动，直到顶部表面也变得平整、水平，与底部表面完全平行。

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Energy can flow across the glass but I put a lid on top, and so the water can't get out.

能量可以穿过杯壁流动,但是我在顶上加了盖子，所以水不能跑出来。

麻省理工公开课 - 热力学与动力学课程节选

Another measure Glass looks at is "sustainable" free cash flow.

FORBES: Magazine Article