烟雾探测器不仅仅是安全建议。在该国的大多数地区，包括我们的国家，他们是合法要求的 - 以及充分理由。这些设备拯救了生命，如果它们在您家中的硬连接时特别有利。
Hard-wired smoke detectors are not typically required in homes that were built before 1992, but come with benefits—they’re directly connected to your home’s main electrical system so that even if forget to change the detector’s batteries, they’ll work so long as your home has power.
