他公然违反了校规。

Tā gōngrán wéifǎnle xiào guī.

He openly violated the school rules.

他公然对同事发火。

Tā gōngrán duì tóngshì fāhuǒ.

He openly got angry with his colleague.

不要公然挑战法律底线。

Bùyào gōngrán tiǎozhàn fǎlǜ dǐxiàn.

Do not openly challenge the bottom line of the law.