例句與造句

1. The bonds, which were introduced in 1956, are in units of one pound and are redeemable at face value on demand .
   這種債券始于1956年，以一英鎊為單位，需要時(shí)可按面值兌現(xiàn)。
2. It's difficult to find value on demand in a sentence. 用value on demand造句挺難的