其二，美联储已经在交易低风险，低回报的国债和购买高收益的私人债券-例如银行贴现贷款，商业票据，和抵押担保证券。

Second, it has been trading in low-risk, low-return Treasury debt and buying higher-yielding private debt—discount loans to banks, commercial paper, and mortgage-backed securities, for example.

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其二，美联储已经在交易低风险，低回报的国债和购买高收益的私人债券-例如银行贴现贷款，商业票据，和抵押担保证券。

Second, it has been trading in low-risk, low-return Treasury debt and buying higher-yielding private debt—discount loans to banks, commercial paper, and mortgage-backed securities, for example.

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