coupon

这张债券的息票利率是5%。

The bond's ___coupon rate is set at 5% annually.

我在超市用优惠券节省了10美元。

I saved $10 at the supermarket by using this ___coupon.

她剪下报纸上的优惠券，在超市省了5块钱。

She clipped a ___coupon from the newspaper and saved $5 at the supermarket.