死脑筋

tā zhǐ shì sǐ nǎo jīn bù shi yǒu yì de

她只是死脑筋，不是有意的。

She is just one track-minded, not to be harmful.

dà duō shù rén rèn wéi nǐ gù zhi sǐ nǎo jīn

大多数人认为你固执，死脑筋。

Most people think you are stubborn and bullheaded.

tā shì sǐ nǎo jīn dàn tā shì gè hǎo shì bīng

他是死脑筋，但他是个好士兵。

He was a hard-head, but he was a good soldier.