ما معنى Discount, money-market and bond-equivalent yields؟

For a bill with $t$ days to maturity and price $P$ per 100 of face value: the discount yield $d$ (bank discount basis) is the discount expressed on the face value over a 360-day year, $P = 100\,(1 - d\,t/360)$; the money-market yield $m = \frac{100 - P}{P}\frac{360}{t}$ is simple interest on the amount paid over a 360-day year, the rate of a deposit of the same term; the bond-equivalent yield $i$ (the Treasury’s investment rate) is the same on a 365-day year, $i = \frac{100 - P}{P}\frac{y}{t}$ with $y = 365$, or 366 if the year after issue contains a 29 February, for bills of at most half a year; beyond half a year it solves

a semiannual compounding that makes it comparable with the yield of a coupon bond (Chapter 3).