discount可數嗎

　　Customers are offered a 10% discount if they pay cash.

　　顧客若付現金，可獲九折優惠。

　　Do you give any discount?

　　你們打折嗎？

　　The theatre gives a 10% discount to parties of more than ten.

　　劇場給十人以上的團體打折10%。

　　We cannot discount the possibility of further strikes.

　　我們不能低估再次發生罷工的可能性。

　　They were selling everything at a discount.

　　他們銷售的所有商品都打折。