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。
Privilege violation
，这一点在服务器推荐中也有详细论述
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Rhys urged Americans to mark St David's Day by following the patron saint's motto, "gwnewch y pethau bychain" or "do the little things", on 1 March.