Sales are limited by the number of people interested in a firm's products and services and by customers' capacity to make purchases.

产品的销售量受制于潜在购买者的数量以及消费者的购买力。

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His children, in turn, parlayed their ties to the President into the role of middlemen for government purchases and sales of oil products, plastics, arms, airplane parts and petrochemicals.

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Tumi said it believes many consumers deferred purchases of its products during the financial crisis, and postcrisis sales appear to be increasing due in part to these deferred purchases.

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"Even small distortions of assessed prices may have a huge impact on the prices of crude oil, refined oil products and biofuels purchases and sales, potentially harming final consumers, '" the Commission said.

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