This file, called "consolidated. db, " kept a log of the mobile device's general location going back to June when Apple released a new version of its operating system.

这个文件是“consolidated.db”， 保留了大量移动设备自从7月以来的地点历史信息数据，那可是苹果发布新操作系统的日子。

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The user's hand also decreases the receive SNR by less than 4 dB. The user's hand effect should be considered in antenna design for mobile devices.

但是在实际的使用中，移动终端（如手机等）中的天线性能会受到人手的影响。

youdao

All personal music players and mobile phones sold in the EU must now have a sound limit of 85 decibels (dB), but users can increase it to 100dB.

BBC: Fears that music volume limits 'could be ignored'