这个“闪电暴跌”促使当局取消了一些涉及非正常价格的交易，其中60 - 70%在ETFs中，远远高于它们在市场中的实际份额。

This "flash crash" prompted the authorities to cancel a bunch of trades made at unusual prices. Between 60% and 70% of those trades were in ETFs, far above their actual weighting in the market.

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非常项目是相对于经常项目而言的一些非正常或非经常的交易或事项，依照盈利的持续性原理，它是持续性最弱的项目。

Extraordinary items are some unusual or infrequent transactions or events on contrary to frequent items. According to persistence of earnings, they are the weakest items in persistence.

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以高于正常市场价格来销售稀缺商品如电脑芯片的市场，chaussure puma。这种交易通常以非正常渠道进行，手段虽不犯法但也不被认为是合乎道德的。

A market in which anxiousness goods such as machine chips are traded at above-market prices through product channels or by methods not banned but usually not considered ethical.

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