A customer standing in a store and armed with a smart phone can call up comparative prices from rivals - unless the item in question is only available at that particular store.

携带智能手机去商店购物的顾客，可以查询其他商家同种商品的价格——除非该商品只在那家商店有售。

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The paper induces the comparative static effects between oil price and goods supply, sectoral product, GDP, employment, income of factors, prices of factors.

模型得出了商品供应、部门产出、GDP、就业、要素报酬、要素收入等对石油价格波动的比较静态效应。

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Talking about comparative strengths, developed countries have advanced key technologies and equipment, but the demand for their products and equipment is limited due to high prices.

从各自的比较优势看，发达国家有关键技术、装备先进，但成套装备和产品因价格较高、销路受限；

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