细菌生产量与浮游植物毛生产量比值平均为0.15。
The average ratio of bacterial production to phytoplankton gross production was measured as 0.15.
通常取得居民对房屋承受能力的方法是计算出平均房价与居民平均收入的比值，因为这些收入最终要在贷款的协助下购买房屋。
A common measure of affordability is the ratio of average house prices to average earnings, since income must ultimately pay for the acquisition of a property financed with a loan.
如果把贫富排行榜上前五个州的平均人均GDP和后五个州的平均人均GD P作对比，这个比值的变化幅度会小一些，但仍将呈上升趋势。
The change is less pronounced if you average GDP per head in the five richest and five poorest states, but it still holds.
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