看起来是一些沿特定路径移动的金属微粒。
They seem to be metal particles that move along certain paths.
,如果你从Q0沿任意一条路径移动到，值将连续地由11变到。
And, to go from one to the other, x+2y+4z Q1 If you're moving along any path from Q0 to Q1, 3 this thing will change continuously from 11 to 3.
矩形的左上角始终沿着路径移动，这是因为矩形的长边和短边是从左上角开始绘制的。
The top left-hand corner of the rectangle follows the path, since that is where the rectangle's width and height are drawn from.
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