So we have--U.S. Government issues bills and that's less than or equal to one year and they pay no interest.

美国政府发行的短期国库券,期限通常小于或等于一年,且不付息

耶鲁公开课 - 金融市场课程节选

Effectively, you get interest from this because it's sold at a discount, so the price that you pay is equal to one hundred minus the discount.

实际上,你仍然从中获得利息,因为债券是打折出售的,所以买入价,等于一百减去折扣

耶鲁公开课 - 金融市场课程节选