But central Banks already try to estimate the "output gap", the extent to which economic growth is above or below trend, when setting interest rates-and that's fiendishly difficult.

但是央行已经开始尝试评估“产出缺口，”来确定制定利率政策时，经济增长是否高于发展趋势的程度，这也是十分困难的。

youdao

Rather than follow the conventional route of deriving an inflation forecast from an estimate of potential output, they do the opposite: they infer the output gap from the behaviour of inflation.

他们不是按照传统根据产出缺口来推测通货膨胀率，而是反过来：从通货膨胀的走势来推测产出缺口。

youdao

When someone see a mature man with a woman half his age, they estimate him to be much older than it really is because of the obvious gap, said the study.

研究表示，当人们看到一个成熟的男人和只有他一半年龄的女性在一起时，因为年龄差距较大，这个男人往往要显得比实际年龄更大一些。

youdao

That gap between the official estimate and mine is significant.

FORBES: Magazine Article

The HMRC's estimate of the alcohol tax gap was published most recently in September 2011.

BBC: Bottles

Earlier this year, staff at the Federal Reserve also marked down their estimate of the country's potential GDP and the output gap in response to the surprisingly steep drop in unemployment.

ECONOMIST: Free exchange