It's often claimed that limits on trade benefit only a small number of Americans, while hurting the vast majority.

人们往往主张说对国际贸易进行限制只会让少量美国人受益，而损害了大多数人的利益。

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But international maths is a form of marketplace, where all sorts of people trade their intellectual wares to enormous mutual benefit.

但对于国际数学界而言，这又确实是一种市场形式，在这里各式各样人为获得双赢而彼此交易他们智慧的结晶。

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To most thoughtful people, unemployment benefit embodies a painful trade-off.

对多数有识之士而言，失业救济体现了一种痛苦的权衡。

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Countries with trade surpluses benefit from trade because they use the unspent foreign currency to invest in their prosperous trading partner.

FORBES: Is 95% of the Trade Imbalance Legal Tax Evasion?

Trade will benefit southern Africa as it does everywhere else--by encouraging efficient producers to make what people want.

ECONOMIST: Opening South Africa

Free-trade agreements benefit big business more than the poor, according to this camp.

CNN: Big Picture: Hemisphere of influence