Adding to investor wariness about commodities are concerns about the possibility of deflation, or a decline in the general level of prices for goods and services.

投资者还担心有可能出现通货紧缩，也就是商品、服务的总体价格水平下降，因而对大宗商品就更加谨慎了。

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Customary royalties on commodities is about 12.5%, but in cases of highly desirable properties or where there is a great deal of disruption to one's home or property, the rate can be 25% or higher.

按惯例征收的商品使用费约为12.5%，但如果是非常理想的财产，或某人的房屋或财产遭到严重破坏，税率可达25%或更高。

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But analysts are less confident about the outlook for commodities prices.

但是，分析师对大宗商品价格前景不那么有信心。

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But we also talked about commodities.

FORBES: How Much Commodity Exposure Is The Best?

It joins just a handful of firms that have formally told U.S. commodities regulators about plans to set up an EBOT.

FORBES: Magazine Article

But there is no getting around the fact that two of the staples of the world food industry are about to become scarce commodities.

BBC: US crops tell story of future world food prices