... arbitrary 专断的，凭主观的(陪考) estimate 对一般数值、的价格的估计 表示粗俗 uate 评价，评估 coarse 1、的粗糙；2、的言行举止粗鲁 ...
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在某些情况下，差异是极端的：面板制造商销售给生产商的裸32英寸液晶电视面板的价格估计为223美元，但这些面板的制造成本为248-256美元。
In some cases the discrepancy is extreme: Panel makers are selling bare 32-inch LCD TV panels for an estimated $223 to manufacturers, but those panels cost between $248 and $256 to build.
所以投机应该由投机专家来做，他们对市场有专门的知识，比较善于估计价格的走向，比较容易赚到钱。
Therefore, speculation should be done by experts in speculation, who have a specialized knowledge of the market, specialize in estimating the trend of prices and earn money easily.
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)。
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).
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