You store the collection of book objects in a map.
图书集合存储在一个映射图中。
Map: the map type mandates the structure for a collection of topics.
映射：映射类型约束了主题集合的结构。
The call to map returns a new collection.
调用map会返回一个新的集合。
And after travelingthere, the map became my collection.
当我到达后，地图就成了我的收集品。
The MAP Toolkit supports many other kinds of data collection as well.
map工具包支持数据收集以及许多其他的类型。
The MAP Toolkit supports many other kinds of data collection as well.
map工具包支持数据收集以及许多其他的类型。
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