The pubertal mice, however, failed to learn to avoid it even after several rounds.

然而，发育期老鼠在几次逃窜之后却未能知道回避它。

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Several rounds of negotiations held in China failed to produce an agreement.

此前在中国举行的几轮谈判未能达成任何协议。

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Interest rates are already essentially at zero and two rounds of quantitative easing, in which the Fed pumped $2.3 trillion into the financial markets, failed to get the U.

利率已经在近零水平，美联储通过两轮量化宽松为金融市场注入了2.3万亿美元的流动性，但却未能让美国经济强大到足以自立。

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Interest rates are already essentially at zero and two rounds of quantitative easing, in which the Fed pumped $2.3 trillion into the financial markets, failed to get the U.

利率已经在近零水平，美联储通过两轮量化宽松为金融市场注入了2.3万亿美元的流动性，但却未能让美国经济强大到足以自立。

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