用“underground economy”造句大全，underground economy造句

There is tax evasion in underground economy and open economy.

Speaking in Texas close to the border with Mexico, Mr Obama said bringing illegal immigrants out of the underground economy would be good for the country as a whole.

Study of influence of underground economy on macro economy in China;

Contrasted with the underground economy, recessive industry is a special industry characterized by its relativity, extensiveness, scale, and transitivity.