Perishable products have obvious characters of short sales cycle, low residual value of unsold products in the end of period and uncertainty demand.

易逝品具有销售周期短、期末未售出产品残值低、需求不确定性大等明显特征。

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One source of uncertainty is demand.

不确定性的一个来源是需求。

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There's a lot to like about the policy; it sustains private demand and reduces consumer uncertainty while reducing the incidence of the long-term unemployment that now afflicts the American economy.

这项政策的好处还有很多；它维持了私人需求，在减少长期失业发生率的同时减少了消费者的不确定性，而美国经济正受到来自长期失业的困扰。

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What is holding back firms from investing is now mainly uncertainty about demand rather than access to credit, says Mr Radley.

ECONOMIST: The economy after the election

This disruption comes at a time of increasing uncertainty for PC demand.

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Several resource-sector shares fell, amid uncertainty over Chinese demand growth and after a firm U.S. dollar pressured commodity prices in New York Wednesday.

WSJ: Asian Markets End Mostly Lower