Indeed, its share of world imports has fallen from 21% to 16% over the past five years - further proof that demand is strong elsewhere.

在过去的五年里，美国的进口从占全球进口的21%跌至16%。

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The CARD Act also requires that students under age 21 show proof of sufficient income or get a co-signer to obtain credit.

WSJ: Cards Return to Campus