想象一下，你用饼干模具在面团上按了一下，这就是 ExtrudeGeometry 做的事。
Border Points: Each cluster has a limited number of defined "border points" – these are the gateways in and out of the cluster.
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nodejs-1:22.19.0-2.fc42.x86_64
would end up talking to a teller who simply keyed the transaction into a 3604,