And it would require the Fed to have a lot of confidence in its estimate of the naturalunemployment rate, a notoriously slippery thing to measure.
而且这也要求美联储对于它所估计的自然失业率数值有足够的信心——这是在测量众所周知的不稳定的数值。
2
Registered unemployment rate in the town is increasing year by year, exceeding 4%, the naturalunemployment rate, suggesting a serious situation.
城镇登记失业率逐年增加，超过了4%的自然失业率，就业形势比较严峻。
3
And it heard evidence that migrants may push down the "natural" rate of unemployment, since they are more flexible than sluggish Britons about which jobs they take.