If you describe something as atrocious, you are emphasizing that its quality is very bad.
appalling , abominable
I remain to this day fluent in Hebrew, while my Arabic is atrocious.
我直到今天希伯莱语仍很流利,而我的阿拉伯语则极差。
If you describe someone's behaviour or their actions as atrocious, you mean that it is unacceptable because it is extremely violent or cruel.
The judge said he had committed atrocious crimes against women.
该法官称他对妇女犯下了残暴的罪行。