“酌情减轻”可以翻译为 “reduce the punishment at one's discretion” 或 “mitigate the penalty as appropriate”。
“reduce the punishment at one's discretion” 中，“reduce the punishment” 表示“减轻惩罚”，“at one's discretion” 表示“酌情、根据自行判断” ，整体传达出根据具体情况和判断来减轻惩罚的意思。
“mitigate the penalty as appropriate” 里，“mitigate the penalty” 意思是“减轻处罚”，“as appropriate” 表示“酌情、视情况而定” ，同样表达了酌情减轻处罚的含义。