第二，我们将直接在位于数据库根的键下面存储然后删除一些简单的值和数据结构。
Second, we will store and then delete some simple values and data structures directly under keys at the database root.
MongoDB 不仅仅是一个基本的键/值对存储数据库，让我们简单地看一下它的其他特性
MongoDB is a lot more than just a basic key/value store. Let's take a brief look at some of its other features
MongoDB 不仅仅是一个基本的键/值对存储数据库，让我们简单地看一下它的其他特性
MongoDB is a lot more than just a basic key/value store. Let's take a brief look at some of its other features
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