shadow economy

• 地下经济； ph.；灰色经济

shadow economy的用法和样例：

例句

1. The report also factors in the underground economy.
   该报告也计入了地下经济因素。
2. S.Most of that is likely in what he calls the underground economy, where transactions are made beyond the oversight of government -- much of which is juiced by the black market.
   罗格夫认为，这些纸币可能都存在于他所谓的地下经济中，这里的交易不受政府监管，很多政府官员都被黑市收买了。