The bigger they come, the slower they move
12月20日，圆桌论坛围绕“弥合数字鸿沟 让老年人共享数字红利”主题展开探讨。
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The tests used in standards for evaluating smoke alarms were developed back in the 1980s. However, despite changes in building materials since then, smoke alarms remain reliable, says Chagger: "They still respond to all the main fires we get today."