shadow economy的用法和樣例：
例句
- The report also factors in the underground economy.
該報告也計入了地下經濟因素。 - 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.
羅格夫認為，這些紙幣可能都存在于他所謂的地下經濟中，這里的交易不受政府監管，很多政府官員都被黑市收買了。
