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I hook up to the interent everyday. 我每天都挂在网上.
Hook up to the internet就是上网,连接网络的意思.
Hook up: to connect somebody/something to a piece of electronic equipment or to a power supply 把…接通电子设备（或电源）
Check that the computer is hooked up to the printer. 检查一下计算机是否与打印机接通.
