it just works. no special machinery needed. the boolean operators distribute over derivatives the same way union does. derivatives are such a powerful and interesting tool that i will dedicate a separate post to them, but the main point is that they give us a simple and uniform way to handle all regular language features, including intersection and complement.
At its booth at MWC, Vivo actually set up a small studio in which you could take a video using the phone inside a pro camera rig, and the phone was mostly displayed inside a similar rig. But even without it, the 400mm lens it packs is imposing (and very pocket-unfriendly).
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The company’s gross margin has consistently been below the industry average, dropping to 23% in 2024 and then recovering to 24.7% in the first three quarters of 2025—still far below the 28%–32% level of leading players. Raw material costs accounted for as much as 87.5%, and rapid expense growth further squeezed profit margins. Overall, the company’s scale advantage stands out, but its earnings are not sufficiently stable. Growth remains primarily driven by store count, and operating efficiency urgently needs improvement.，推荐阅读体育直播获取更多信息
Фото: Slaven Vlasic / Getty Images for Cantor Fitzgerald
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