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3. How have different electronic devices changed over time.
over prep. during sth. or while doing sth. work over night They had a pleasant chat over a coffee. They spent an hour over lunch. = Their meal lasted an hour. Over a two-year period (a period of two years), Nancy became addicted to painkillers.
通宵工作
在两年的时期内，她对止痛药上了瘾。
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