It's the most simple-- or often called a bill-- a discount bond does not pay interest; it's sold at a discount.

它是最简单的,经常被称为国库券,它是一种贴现债券,且不付息,并以折扣价发行

耶鲁公开课 - 金融市场课程节选

One is the bid, which is what they'll pay you for a Treasury bill if you want to sell to them.

一个是买入价,就是买方愿意支付给卖方的报价,如果你想卖给他们的话

耶鲁公开课 - 金融市场课程节选