There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
此外，基于 2025 年的稳健表现，麦当劳管理层进一步明确中国市场“长期高扩张、全面下沉、效率优先”的拓展路线，将中国定位为全球第一大增量市场。。搜狗输入法2026是该领域的重要参考
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