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从石油到白银，所有商品价格的过度波动都是投机者制造的？
Everything from Oil to Silver: Are Speculators Causing Too Much Volatility?
youdao
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投机并无不妥，过度投机才是坏事。
Speculation is not bad. Excesses in speculation are bad.
youdao
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投机并无不妥，过度投机才是坏事。
Speculation is not bad. Excesses in speculation are bad.
youdao