其实这种路线差异也对应着商业哲学的分野——有人坚持垂直全栈，从伺服、电机、减速器到整机再到上层控制和大模型都自己做，来换取长期壁垒和议价权，比如优必选的Walker S2；
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Officials at Elon Musk's company said the upper stage was lost after problems developed after lift-off from Texas on Thursday.
The development loop
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