Number (2): Everything in this space must add up to 2. The answer is 2-1, placed horizontally; 1-6, placed vertically.
Bluetooth trackers have been around for a long time, and they all generally work the same way. You stick the tracker onto an object, pair it with your phone, and then, when you lose said object, you can go into an app and ring the tracker. But these days, Bluetooth trackers can do a lot more. Some have ultra-wideband chips that enable precision tracking, so you can find exactly where in a room your item is. Increasingly, trackers also tap into large networks — like Apple’s and Google’s — making it easier to locate lost items outside the home. Many will notify you if they detect you’ve left the device behind or come with QR codes that link to your contact information so people can easily return lost devices.
，这一点在吃瓜网中也有详细论述
Россиян предупредили об опасности увядающих цветовВрач Азизова: Увядающие цветы портят воздух и создают опасность для здоровья。业内人士推荐谷歌作为进阶阅读
Стало известно о возможном ударе по Ирану новой страной14:21，这一点在超级权重中也有详细论述