The plunge in sales of existing homes is severe but not unprecedented.

旧房销售量的骤降是严重的但是并不是史无前例的。

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The splurge was spurred by unprecedented discounts offered by retailers after sluggish pre-Christmas sales.

经历了圣诞节前销售呆滞的零售商们，提供的前所未有的折扣刺激了这次挥霍。

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Like-for-like growth of 7% drew a line under two unprecedented years of falling sales.

同比增长7%，终结了连续两年的销售额的空前跌落。

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Michelle Krebs at online auto advisor Edmunds.com called the sales freeze "unprecedented."

VOA: standard.2010.01.28

The FDA had been poised to allow over-the-counter sales with no age limits when Sebelius took the unprecedented step of overruling the agency.

WSJ: Obama faces choice on morning-after pill limits

The problem is software and services, however successful, are unlikely to generate the kind of outsize profit growth from rising sales of iPhones and iPads that drove Apple's shares to unprecedented highs last year.

BBC: How Apple and Google's fortunes are linked

Sweden has been involved in arms sales to Saudi Arabia in the past, but the planned factory is seen as unprecedented.

BBC: Sweden in secret Saudi arms factory project - report