Volatility remains high, which has yielded these recent buying and selling opportunities to those following the Common Sense system.

股市震荡为遵循常识投资法的投资者带来最近的买进卖出机会，而现在震荡的可能性依然很高。

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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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The system has accomplished all sorts of business, such as buying, stocking, and selling, and realized the function to send data to management center.

该系统实现了连锁加油站进、销、存各种业务管理，另外还包括向总部管理中心上传数据的功能。

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Through a combination of anonymity technology and a sophisticated user-feedback system, Silk Road makes buying and selling illegal drugs as easy as buying used electronics and seemingly as safe.

FORBES: How Technology Complicates The War On Drugs: Guns And Drugs For Sale Online

This would parallel to some extent the late 1980s, when a dual pricing system allowed Party officials in state enterprises to profit by buying commodities at state prices and then selling them on the open market.

WSJ: The Urumqi Effect