But those low interest rates are a sign that central Banks are still very worried about the fragility of the economy: in its 300-year history the bank of England has never kept rates so low.
但是这种低利率象征着央行对脆弱的国家经济依旧极度担忧：英格兰银行300年的历史上从未有过如此低的利率。
Because of its fragility, the scroll is seldom displayed, even in Beijing, and has never been lent for an overseas exhibition.
由于其脆弱性，该长卷是很少显示，即使在北京，从未借给一个海外展览。
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