By controlling for individual and environmental influences on weight, such as income and health, they then measure whether food-price changes affect body-mass index (BMI).

如果不考虑诸如收入和健康这些影响体重的个人和环境因素的话，作者估量出了食品价格变动是否会影响体重指数。

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According to types of commodity, it can be divided into goods price index of an individual event, the classification price index of the goods and total index.

按商品种类不同，分为单项商品价格指数、商品类别价格指数和总指数。

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More than 50, 000 individual prices are collected in each survey round, and a cost-of-living index is calculated from the price data to express the difference in the cost of living between any two cities.

ECONOMIST: Oslo remains the world's most expensive city