Last week, NOAA released preliminary figures for its annual greenhouse gas index, which incorporates data from 60 sites around the world - including Zeppelin.

美国海洋与大气管理局上周公布了温室气体年度指数的初步数据，其源数据来自包括齐柏林在内的全球60个观察点。

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Compare the results obtained from gas chromatography and refractive index measurements. How closely do they agree? If they are not in good agreement can you provide an explanation?

比较一下气相色层分析和折光率的测量结果。它们有多一致呢？如果它们不能很好地符合的话，你可以提供解析吗？

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The transmission error of natural gas is an important economical index for gas transmission companies.

天然气输差是燃气公司一个重要的经济指标。

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The gas index fell 29.5% in November and gas prices are now 47.0% below their July peak.

FORBES: Magazine Article

The widely quoted consumer price index figure excludes gas, health care and education, all of which have climbed at rates higher than the CPI.

FORBES: The Deeper Roots Of Economic Anxiety

According to the ETF Finder at ETF Channel, SM makes up 3.09% of the First Trust ISE-Revere Natural Gas Index Fund ETF ( AMEX: FCG) which is trading relatively unchanged on the day Monday.

FORBES: SM Energy Shares Enter Oversold Territory