The proportion of free oleic acid that an olive oil contains is an accurate measure of the oil's acidity.

橄榄油中游离油酸的比例是对橄榄油酸度的精确测量。

We want an estimate of the proportion of oil which the blindfold, mill-turning, unbiased critic can squeeze out of you.

我们要的是估计一下，蒙着眼睛、转动着磨盘、不偏不倚的批评家能从你身上榨出多少油水。

All this, Mr Feng says, has allowed Daqing Oil to raise the proportion of the field's reserves that it is able to recover from roughly 35% to 45%.

冯先生表示，所有这些做法可以让大庆石油的石油储量显著地恢复，比例为35%到45%。