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手机应用悄无声息但是极大地改变了人们出行的方式。
Quietly, but inexorably, apps are changing the way people travel.
youdao
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用报警，甚至当你的手机在无声状态。
Use alarm even when your smartphone is in silent mode.
youdao
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用报警，甚至当你的手机在无声状态。
Use alarm even when your smartphone is in silent mode.
youdao