selling prototype
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以上为机器翻译结果，长、整句建议使用 人工翻译 。
The device, a prototype of which was unveiled this week, is an emotion-sensing system designed to help investors keep a cool head when buying and selling.
刚于本周公布的这项设备的雏形， 是一个情绪感知系统，旨在帮助投资方在买卖时，保持冷静。
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Top-selling titles this April included Prototype 2, Kinect Star Wars and Call of Duty: Modern Warfare 3.
BBC: Video game sales drop sharply in US
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