National regulation is an important economic levers of citizen income.

是国家调节公民收入的重要经济杠杆。

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Most countries begin to send large numbers of tourists overseas only when the average citizen has a disposable income of five thousand dollars.

只有当人均可支配收入达到5000美元时，大部分国家的公民才会大批出国旅游。

youdao

Most countries begin to send large numbers of tourists overseas only when the average citizen has a disposable income of five thousand dollars.

NEWYORKER: The Grand Tour

If a Puerto Rican citizen has never paid federal income tax, it looks to the IRS as if the person filing a return simply moved to the continental U.S. and began working.

WSJ: Billions Lost in Tax-Refund Scam

British patent laws were heavily skewed to the benefit of the wealthy, with patent fees levied at 10 times the annual income of the average British citizen.

FORBES: A Message To Congress: Keep Your Hands Off The Patent Office