他擅自离岗，导致生产线一度停工。

Tā shànzì lígǎng, dǎozhì shēngchǎnxiàn yídù tínggōng.

He left his post without permission, causing the production line to halt for a while.

未经同意擅自公开他人隐私，是对对方的不尊重。

Wèijīng tóngyì shànzì gōngkāi tārén yǐnsī, shì duì duìfāng de bù zūnzhòng.

Disclosing someone’s privacy without consent is disrespectful to them.

你不能擅自修改合同内容。

Nǐ bùnéng shànzì xiūgǎi hétóng nèiróng.

You must not alter the contract terms without authorization.