The desired effect is to place bookmarks on a map of Manhattan, one bookmark per property with apartment listings.

理想的效果是在曼哈顿的地图上放置书签，公寓列表的每处房产对应一个书签。

It includes methods to add and delete bookmarks, retrieve a user's bookmark list, and retrieve (or rename) a user's tags.

它包括添加和删除书签、检索用户书签列表和检索（或者重命名）用户标记的方法。

It is also used in bookmarks.

书签也用到它。

Use the bookmarks manager.

使用书签管理器。

I already have bookmarks.

我已经有书签了。