The obdurate supplier refused to lower prices despite repeated complaints about late shipments.

那家頑固的供應商儘管一再被抱怨延遲出貨，仍拒絕降價。

Our manager remained obdurate about the travel policy, even after staff raised valid concerns.

即使員工提出合理的疑慮，我們經理對差旅政策依然固執己見。

An obdurate customer kept demanding a full refund for a product he had clearly damaged.

一位執迷不悟的顧客明明自己弄壞了產品，卻一直要求全額退款。