一定时期证券交易的总成交额。

The study of markets and securities based on historic price.

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如果真的能在清除所有假货方面做得很出色，将对总成交额产生负面影响。

If you were really good at cleaning up all the shoddy goods, it would have a negative impact on the gross transaction volume.

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据普华永道咨询公司数据，从价值上计算，去年黄金交易占矿业类总成交额的31%。

By value, 31% of the mining deals last year involved gold, according to the consulting arm of PwC.

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