delete before current position

例句：

1. 1. I want to delete the old photosfrom my phone.
   我想从我的手机上删除旧照片。
2. 2. The teacher asked us to deleteall the irrelevant notes from ournotebooks.
   老师要求我们把笔记本上所有不相关的笔记都删掉。
3. 3. Afterreading the book, wedecided to delete the chapter onlove and focus on the rest ofthe story.
   读完这本书后，我们决定删除关于爱情的那一章，专注于故事的其他部分。