on sale
英 [ɒn seɪl] 美 [ɑːn seɪl]
（尤指在商店）出售，上市；折价销售，减价出售
例句
All tickets go on sale this Friday.
所有票在本星期五开始销售。
He was disgusted with the stodgy pizzas on sale in London.
他讨厌吃伦敦卖的难以下咽的比萨饼。
I guess people everywhere like to buy things on sale.
我想世界各地的人都喜欢买打折的东西。
