The Federal Reserve again kept interest rates near zero for an "extended period", but its accompanying language on the economy was markedly less optimistic than in recent months.
美联储又将在更长一段时间内将利率控制在零附近，但是关于经济的一些评论明显没有前几个月乐观。
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Only unmirrored dbspaces and temporary dbspaces can have a non-zero extend size, because chunks cannot be extended in any other type of space.
Bernanke and his colleagues last month held a key bank lending rate at an all-time low near zero and pledged to hold it there for an "extended period."