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。
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.
所有这类相互通信的平行进程的分层网络的卖点就是：它们是完全确定的。
The selling point for all such layered networks of communicating parallel processes is that they are completely deterministic.
你完全是蹲着的，直到你的大腿与地板达到平行的角度，然后尽可能地往高跳，重复这个动作（视频）。
Basically you squat down until your thighs are parallel to the floor, then jump up as high as you can, and repeat. (Video.)
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