Do you know anywhere I can buy a second-hand computer?
你知道我在哪儿可以买到二手计算机吗？
He only took interest in buying a second-hand computer.
他只对购买旧计算机感兴趣。
It was I that (who) bought a second-hand computer yesterday.
我昨天买了一台二手电脑。
I'm considering buying a second-hand computer for I'm short of money now.
因为现在钱不够，我正考虑买台二手电脑。
On the one hand, computer makes human beings' life become easier.
一方面，电脑使人们的生活变得更容易。
On the one hand, computer makes human beings' life become easier.
一方面，电脑使人们的生活变得更容易。
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