中国和其他国家都已然做到了这一点，美国需要效仿才能保证自身的竞争力。
China and other countries have done just that, and the US needs to do the same in order to compete.
美国的《非洲增长和机会法》降低了多宗商品的关税壁垒，这是一个好的开端，但是需要加以扩大并让其他国家效仿。
America's African Growth and Opportunity Act, which lowered tariff barriers for many goods, is a good start, but it needs to be widened and copied by other nations.
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