adj.惩罚的，刑罚的，应受刑罚的，严重的，严厉的

The defendant was sentenced to five years in prison for his penal offense.
被告因犯罪被判刑五年。
The new law imposes stricter penalties on drunk driving.
新法律对酒驾实施了更严厉的处罚。
She received a monetary penalty for failing to pay her taxes on time.
她因未按时缴税被罚款。
A criminal conviction carries a lifelong penal record.
犯罪定罪会留下终身的犯罪记录。
The court imposed a suspended sentence, allowing him to avoid immediate penal confinement.
法院判处缓刑，让他暂不入狱服刑。
The penal colony was established as a means of punishment and rehabilitation.
流放地作为惩罚和改造犯人的手段而设立。
The government is planning to revise the penal code to address modern crimes.
政府计划修订刑法以应对现代犯罪。
He completed his community service as part of his conditional penal release.
作为缓刑条件的一部分，他完成了社区服务。
The prisoner's good behavior earned him a reduction in his penal sentence.
囚犯的良好行为使他的刑期得以减刑。
The penal system aims to rehabilitate offenders and prevent them from committing crimes again.
惩教体系旨在帮助罪犯改过自新，防止再次犯罪。