On a conservative estimate, food-price rises may reduce the spending power of the urban poor and country people who buy their own food by 20% (in some regions, prices are rising by far more).

保守的估计，粮食价格的上涨将城市的贫穷人口与农村人口的购买力减少20%(在一些地区，价格上涨更高)。

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The average fan spends $25 – a conservative estimate based on ticket price and souvenirs.

平均球迷花费$25–根据票价和纪念品的一个保守估计。

《柯林斯英汉双解大词典》

Disturbingly, the figures are likely to be a conservative estimate, because scientists have insufficient data on 836 species to even classify how threatened they are.

然而令人不安的是，这些数字很可能只是一个保守的估计。因为科学家们对哺乳动物中的836个种类还缺乏足够的数据，甚至无法按照它们受威胁的程度来归类。

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If emerging markets keep on growing three percentage points a year faster than America (a conservative estimate), they will account for two-thirds of the world's output by 2030, reckons Mr Subramanian.

ECONOMIST: A game of catch-up