You definitely gain the convenience of carrying around a device that weighs less than a single textbook, but you lose the ability to buy used and resell.
你肯定需要方便到处携带而且比单个教科书还要轻便的设备。但是，这将让你失去购买二手并且再卖出的机会。
2
She confirmed that the device would have brought down the aeroplane carrying it.
她证实该装置将被从携带它的飞机上取下。
3
Will we be in the habit of carrying a small device with us that can be used as a cell phone, a fax, a microphone and an Internet connection?