Recently, unplugged (不插電的) vacations have become popular in the US. American parents are not satisfied with their children glued (黏住) to their screens, and worrying about the possible h1. to young brains (大腦). American children aged 13 to 17 spend nearly four hours a day online. More than half have their o2. smartphones. So more parents have p3. to get their children off smartphones and computers during vacation. Plans I 4.vacations in the wilderness, out of the reach of Wi-Fi, and designing active schedules (安排) to k 5.their children busy.

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