Our hardheaded supplier refused to lower the shipping fee even after we showed competitors' quotes.

我們那位固執的供應商，即使看了競爭對手的報價，仍拒絕降低運費。

The manager was too hardheaded to accept the survey results during Monday's meeting.

經理太固執了，在週一的會議上就是不肯接受調查結果。

A hardheaded customer kept demanding a refund despite the store's clear return policy.

一位頑固的顧客儘管商店的退貨政策寫得很清楚，仍不斷要求退款。