cou·pon /ˈkuˌpɑn, ˈkju-/
 息票,贈券
 Cou·pon n.
 1. Com. A certificate of interest due, printed at the bottom of transferable bonds (state, railroad, etc.), given for a term of years, designed to be cut off and presented for payment when the interest is due; an interest warrant.
 2. A section of a ticket, showing the holder to be entitled to some specified accomodation or service, as to a passage over a designated line of travel, a particular seat in a theater, or the like.
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 coupon
      n 1: a negotiable certificate that can be detached and redeemed
           as needed [syn: voucher]
      2: a test sample of some substance