First Great Western are introducing the on-demand service via seat-back screens on one coach of each of their high-speed trains.

第一大西部铁路公司向大家展示了这项火车上的“随选服务”，该服务通过每个座椅后的液晶屏幕来实现，每辆高速列车都会安置这种液晶屏。

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Studies show that people are more likely to suffer from back problems if they always sit before computer screens for long hours.

研究表明，如果人们总是长时间坐在电脑屏幕前，他们更有可能患上背部疾病。

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This enables the user to use the back button to switch between both screens while displaying the number of stocks in the cart.

这样就允许用户在显示购物车中股票数量时使用“后退”按钮在两个屏幕间切换。

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Nevertheless, many airlines say there is still plenty of life left in seat-back screens, especially as they grow larger and more sophisticated.

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In the back, motorized screens will block out the windows, and a large sunroof option is available as a no-cost option.

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But when the power went back on a lot of us went back to our screens and permanent states of partial attention.

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