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Today 's ultralow interest rates are another headache -- a fact that surprises many people .

目前超低的利率是另一个让人头痛的问题——这可能让很多人感到意外。

Ultralow temperature is the biggest problem in our technique improvement .

技术突破的最大难题是太空中的超低温。

But an unstated reason for the ultralow short rates is that they give banks a chance to make big profits by reinvesting cheap deposits in much higher-yielding securities .

但是极低的短期利率所未说明的原因是他们在给银行一个通过在高产出证券中重新投资低额存储金以获取高额利润的机会。

The high density lipoprotein cholesterol is ultralow .

高密度脂蛋白胆固醇超低。

Given ultralow u.s. interest rates , if there was a smart time for china to rebalance its currency reserves away from dollar-based investments , it is now .

考虑到美国超低的利率水平，如果中国要为减少其外汇储备中的美元资产挑选一个明智的时机，那就是眼下。