1. He was so hardheaded that he did not leave his work until the morning when he did not wake up. 他十分的固执，直到他早晨再也没有起来后，他才离开了自己的工作。
2. I had other problems, but except for occasionally being hardheaded, Hillary was above reproach. 我还有其它的麻烦，但希拉里除了偶尔比较固执外，没有任何值得责备的地方。
3. Midwesterners are straightforward and unpretentious, with a reputation as resolute individualists who can be somewhat hardheaded. 中西部的人直截了当而不矫饰，他们一向被认为是坚决的个人主义者，但可能有点固执。
英英解释
adj.
1. unreasonably rigid in the face of argument or entreaty or attack
2. guided by practical experience and observation rather than theory
