简单讲，要做L3，需要先做L2积累数据。那么要做L4，也一样依赖L3的数据。技术上他们是一脉相承的，不存在一口就能吃个胖子的技术路线。
Atmospheric machine-gun has fired storm after deadly storm at the region this year, leaving a trail of widespread destruction
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三星三折叠可能一代亡？总裁回应