In one study of oral contraceptive pills, women with a body mass index (BMI) in the overweight range (a BMI of 25 or more) had a higher risk of pregnancy than those in the normal weight range.

有一项针对口服避孕药片开展的研究发现，体重指数(BMI)达到超重范围(BM I值等于或大于25)的女性比体重指数正常的女性更容易怀孕。

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The body mass index is a tool used to determine the healthy weight range for a particular height.

体重指数是一种用于根据特定身高来决定体重范围的工具。

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While most people cite one number as their current body weight, it may be more realistic to cite a range, since the number does fluctuate daily.

人们经常举出一个数字作为其体重，可能举出一个范围更实际一些，因为体重的浮动。

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Pilots control hang gliders by shifting their own body weight, but the investigation found the teenager weighed less than the recommended pilot weight range for the glider.

BBC: Glider crash site near Ashbourne

The results indicated that the change in "environmental conditions" led to a shift of weight preference towards heavier women with the men considering a wider range of body sizes attractive.

BBC: Stressed men drawn to heavy women