擅离职守: desert one's post; absence without leave; be absent from one's post without leave; leave one's post without permission [sanction]; quit one's post without orders [approval]; take french le
他因擅离职守而玷污了军绩: he stained his military record by going awol
Example Sentences:
1.
A former cleansing worker was sentenced to two months imprisonment for falsifying attendance records to cover up unauthorised absence from duty 一名前清洁工人伪造值勤记录,以隐瞒其擅离职守的行为,被判入狱两个月。