Some households spend as much as 30 percent of their income on lamps and fuel — this for two or three hours of poor quality light at night.

许多家庭在灯具和燃料上的支出占到其收入的30%之多，而这些只为了再每晚能够有两到三个小时的亮光。

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The net profit, if any, may be written off on an average in light of a five-year period, or be used to make up the annual loss, the balance may be incorporated into the enterprise's clearing income.

如为净收益，可按照五年的期限平均转销，或者逐年弥补年度亏损，余额留待并入企业的清算收益。

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In light of the trend, Beijing's taxation authorities explained that the income gained from stocks and funds is exempt from taxes, according to a national regulation.

在这种趋势下，北京税务局解释，根据国家法规，从股票和基金的到的收益是不用征税的。

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We develop a statistical framework that uses lights growth to augment existing income growth measures, under the assumption that measurement error in using observed light as an indicator of income is uncorrelated with measurement error in national income accounts.

FORBES: Celebrate Earth Hour By Turning the Lights *On*

Warren Buffett needs to go back and re-assess his income and taxes in the light of Economics 101.

FORBES: With His Tax Proposals, Warren Buffett Flunks Economics 101

Past studies have also suggested this - although it has been argued the differences may have arisen as light drinkers may come from a higher income or more educated background than abstainers.

BBC: Light drinking 'not harmful to baby' say scientists