去年，美联储实际上推出了购买长期债券的政策，一般被称为“量化宽松”(不要为什么这样叫)。

Last year, the Fed actually did institute a policy of buying long-term debt, generally known as "quantitative easing" (don't ask).

youdao

近几周来，长期债券收益率一直攀升，而且长短期债券的息差(被称为收益率曲线)已高出一般水平。

Longer-dated bond yields have risen in recent weeks and the gap between long - and short-term rates (known as the "yield curve") is much higher than normal.

youdao