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.
This is the story of how years of backend service code ended up shipping inside the game itself.
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我离开家乡到外地求学、工作，直到2025年夏天再次回去。当我循着童年足迹走向这座刚刚有了新身份的故城时，情感发生了微妙的变化。登上城墙，阳光穿过云层，给千年的夯土镀上金边，城墙形制依旧完整，却因普查队员的发现与守护多了一些珍视的温润。夯土层上深浅不一的沟壑，既是岁月侵蚀的痕迹，也是文脉延续的印记。
Singer trolled after asking right-wing protesters not to use his song
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