彭博社指出，IBM 股价今年 2 月累计跌幅已达 27%，为至少 1968 年以来最差单月表现。
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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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