英文作业look back on the past semester

Always look back at the past,not to weep on the failures but 这是什么意思Looking back at the past based on the present,Look to look back on the day and Back to the past look back on造句 look back on与look back into Don’t look back and grieve over the past; it’s gone.Don’t be look not mournfully into the past,it comes not back again.wi Don't look back the past in sorrow for it will never come ba 英语翻译用 look back on look back on 是什么意思啊? look back和 look back on用法一样吗?