first-degree

劍橋詞典

used to describe a crime that is the most serious of its type , especially because of being planned and intended
一級(jí)的，最嚴(yán)重的（犯罪）
first-degree murder /felony /assault 一級(jí)謀殺/一級(jí)重罪/嚴(yán)重侵犯
比較
second-degree 返回 first-degree