Professors sometimes implement policies designed to minimize students' use of digital devices, and some instructors even confiscate tablets and phones.
2
五分之一的美国人将使用平板电脑或智能手机。
One in five Americans will use a tablet or smartphone.
3
与钱包相对的是智能手机或平板电脑。
The opposite of a wallet is a smartphone or an iPad.
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