delete arrow

例句：

1. 1. I deleted the unnecessary files from my computer.
   我从我的电脑中删除了不必要的文件。
2. 2. The teacher asked us to delete all the old notes from the board.
   老师让我们从黑板上删除所有的旧笔记。
3. 3.After reading the book, we decided to delete some of the chapters that were too difficult for us.
   读完这本书后，我们决定删除一些对我们太难的章节。