申请失业补贴人数的四周移动平均值(相对稳定的失业率评判标准)，从上周的490,750人增加到506,500人，是1983年12月以来的最高值。
The four-week moving average of new jobless claims, a less volatile unemployment measure, rose to 506, 500 from 490, 750 the week before, the highest since 1983.
估算是用过去十年的移动平均值。
It is estimated with a moving average over the last ten years.
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