Ignorance of the law excuses no man from practising it.

任何人也不能以不知为借口，不受法律的制裁。

youdao

Persons concerned dare not or will not launch lawsuit because of either ignorance of law or pressure from administrative organs or traditional idea.

行政相对人因不懂法而不知诉，或因行政机关施压或基于传统思想而不敢诉、不愿诉。

youdao

Sotomayor got a taste of such ignorance in her third year of law school, when during a recruitment dinner, a lawyer from a Washington law firm asked the summa cum laude graduate from Princeton whether she thought she would have gotten into Yale Law School if she hadn't been Hispanic.

CNN: Commentary: Latino in the Ivy League