The rise in oil and commodity prices has pushed up inflation in rich countries and acted like a tax on consumers.

原油和商品价格的上涨推高了富裕国家的通货膨胀，这像在向消费者征税。

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Knowledge is simply a commodity; it's a product like any other that has the potential to be sold.

知识只不过是一种商品，和其它商品一样有着被出售的潜力。

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But nor is it beyond the wit of those in charge to consider water like oil or any other commodity, and to use market mechanisms to match supply and demand.

但也不至于像管理者想的那样：水价会超过油或其他日用品，或者要用市场机制来平衡供需。

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"In recession, when you expect prices of other items to come down like automobiles and electronics and many other things, gold is the only commodity where prices are going up like anything."

VOA: standard.2009.09.19

Instead, the best place still looks like the commodity-backed ETFs, such as the SPDR Gold Shares (NYSE:GLD) and the iShares Gold Trust (NYSE:IAU).

FORBES: Gold Bubble? Really?

The market expects commodity based currencies like the Brazilian real to weaken at first because of the downgrade news in the U.S., but strengthen over time.

FORBES: Matter Of Time Before QE3 Sets Sail

So while the iShares ETF is heavily weighted towards the big commodity names like Petrobras (PBR) and Vale (VALE), because that is how the Bovespa index actually looks, the Dreyfus fund can mix it up and invests in companies that are not listed on the Bovespa index.

FORBES: How the Dreyfus Brazil Mutual Fund Beats the Brazil ETFs