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sciencedirect.com
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As for the national debt, the benefits of immigration are only likely to accrue with time. Later generations of immigrants tend to pay more in taxes as educational attainment and incomes rise, according to the Cato Institute’s report, which called children of immigrants “the most potent fiscal engine this country has ever seen.” Should Trump’s immigration crackdown cause a sustained decline in new entries, that engine will be much less powerful than it could have been.
德夫林称，目前的防御指南没有任何改变。如果发生变化，以军会立刻向公众通报并提供最新指示。（央视新闻）