One great challenge for the U.S. economy is slack domestic consumer demand.

美国经济面临的一大挑战是国内消费需求疲软。

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Demand is slack over the summer months.

夏季的几个月市场滞销。

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Without consumer demand to take up the slack, industry can't maintain its strong growth.

没有消费者需求强有力的支持，工业不能保持其强势的增长。

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Without consumer demand to take up the slack, industry can't maintain its strong growth.

没有消费者需求强有力的支持，工业不能保持其强势的增长。

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