一是 “软件定义硬件”。全球销量突破70万台的Plaud的录音卡片是一个范本，其超薄录音设备本身并非利润中心，甚至可能以成本价销售，真正的价值在于，它通过硬件这一无可替代的物理入口，切入“会议记录”这一高频刚需场景，将用户锁定在后续的AI转写、摘要生成等订阅服务中。
I learned that for 4-SAT, if clause to variable ratio is more than 10, the generated problems become difficult to solve, and the likelihood of formula to be SAT or UNSAT is close to 50%. So I generated 3 types of formulas:
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Even a single night of road traffic noise, at levels that are typical of those living in a city, causes stress to the heart and blood vessels
凱投宏觀（Capital Economics）北美首席經濟學家保羅·阿什沃思（Paul Ashworth）指出，新稅率是依據1974 年《貿易法》第122條實施，而該條文「明確規定任何關稅必須以不歧視的方式適用」，這意味著先前的協議很可能會受到影響。