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1·America's Federal Reserve indicated it would be keeping interest rates at close to zero for the foreseeable future, despite declaring its optimism that the country's economy was slowly recovering.

美联储表示，在可预见的未来，它将把利率继续维持在接近于0的的水平，尽管美联储对于美国经济的缓慢回升表示出乐观情绪。

2·The results indicated that the new threshold function could better reserve the characteristics of heart sounds, eliminate noise effectively, and was of strong practical value.

结果表明，新阈值函数能有效地消除噪声和保留心音信号的特征，具有较强的实用价值。