◆on offer<英>(available)供使用的；待出售的
Savings schemes are the best retail investment products on offer.储蓄方案是现有最好的零售投资产品。
country cottages on offer at bargain prices低价出售的乡间小屋
Over 40 new books are on offer at 25 per cent off their normal retail price.超过40种新书降价25％出售。
(reduced in price)特价出售的
Olive oil is on offer this week.本周橄榄油特价出售。