景康的回答：

dig in one's heels（或toes, feet） resist stubbornly; refuse to give in 顽抗; 拒绝让步： officials dug their heels in on particular points. 在一些特定问题上, 官员们拒不让步。

执着等待的回答：

dig in one's heels (或 toes, feet) -esist stubbornly; refuse to give in -顽抗；拒绝让步 e.g. officials dug their heels in on particular points. 在一些特定问题上，官员们拒不让步。