这是最基础的构建模块。BoxGeometry 就像捏泥人时的方块，SphereGeometry 则是球体。注意 widthSegments 参数，它决定了球体的精细度——段数越多，球越圆，但计算量也越大。
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The 9,000-pound monster I don’t want to give back。关于这个话题，safew官方下载提供了深入分析
Medium difficulty hints, answers for Feb. 26 PipsNumber (10): Everything in this space must add up to 10. The answer is 5-5, placed horizontally; 5-4, placed horizontally.