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Offering cell phone data speeds several times faster than you're used to, 4G is expected to start heating up the airwaves in the next year or so.

4G通讯技术——能够让你感觉到手机传输数据速度的飞跃，比你熟悉的速度快几倍的感觉，4G预计将在未来一年时间左后开始成为热门技术。

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The central heating system is programmed to start working at six o'each morning.

中央供热系统安排在每天早晨六时开始运作。

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It didn't start heating up until early last year when the order backlog jumped and sales growth accelerated.

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If you get within a certain number of miles from home, your oven might start heating up, or your humidifier would switch on.

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The stock fell for months after that and didn't start heating up until early last year, when the order backlog jumped and sales growth accelerated.

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