A well-known algorithm, so to speak, for walking a maze, is the righthandrule -- follow the righthand wall until you are out (including around dead-ends).
换句话说，有一个著名的走迷宫算法就是右手法则 - 顺着右手边的墙走，直到出去（包括绕过绝路）。
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Some of them might be spinning clockwise, in which case, according to the right-handrule we would consider them spin-down.