第一句：We can't make any further discounts.

　　我们不能再打折扣了。

　　A: Your offer is uncompetitive compared to that of other firms.

　　你们的报价和其他公司的比起来没有竞争力。

　　B: If you take our quality into consideration, you will think our offer is moderate.

　　如果你们考虑我们产品的质量，您就会认为我们的报价很适中了。

　　A: Yes. You are right.

　　是的。您说得对。

　　B: We can't make any further discounts.

　　我们不能再打折扣了。

　　第二句：This is a special offer and it is not subject to our usual discount.

　　这已经是特价了，就不能再享受平时的折扣了。

　　A: Can we meet each other halfway?

　　我们能不能折中一下？

　　B: This is a special offer and it is not subject to our usual discount.

　　这已经是特价了，就不能再享受平时的折扣了。

　　A: Oh.

　　噢。

　　其他表达法：

　　可以告知客户我们同知名大公司合作给的也是这个价格。

　　This is our rock-bottom price, and we can't make any concessions.

　　这是我们的最低价，我们不能再让步了。

　　Sorry, we generally don't quote on a discount basis.

　　对不起，我们不在打折的基础上报价。