Some smoke alarms have been designed to be ultra-sensitive. Aspirating devices, for example, constantly suck in air in order to detect even small quantities of smoke in a room. They are often used in commercial settings, including server rooms packed with expensive computer tech.
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预制菜并不是一个新鲜概念，但2025年，它因为一场争论而再度出圈——罗永浩大战西贝的公开辩论，让人们惊讶地发现，原来自己在外吃的许多菜品，都来自中央厨房的标准化生产线。