bookmarker

例句：

1. 1.I need to mark the spot where I left my phone.
   我需要标记我留下手机的地方。
2. 2. The book has a bookmark in it that I can use to mark important pages.
   这本书里有一个书签，我可以用来标记重要的页面。
3. 3. She found the bookmark on the table and marked it with her pen.
   她在桌子上找到了书签，用她的笔做了标记。