此外，有些特朗普的政策被指加劇通脹——哈佛大學的經濟學家估算，特朗普在2025年實施的關稅使美國消費者物價通脹率（相較於原本可能的水平）在2026年1月約提高了 0.92個百分點。
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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。