Buying them tends to push up the price; that tends to influence the yield down so it encourages a lower level of interest rate.

买进它们，导致价格上升；,导致参数降低,所以它鼓励一个低的利率水平。

耶鲁公开课 - 金融市场课程节选

We have to ask then, how do we get the price and the yield from this?

怎样确定这种债券的价格和收益呢

耶鲁公开课 - 金融市场课程节选