Operationally, MongoDB can be run in two modes depending on the needs of the application.

Online shell allows you to try out MongoDB without installing

在线shell让您能够不安装MongoDB即可试用

Morphia's filter operators closely map to the query operators used in MongoDB queries.

Morphia的筛选运算符紧密地映射到用于MongoDB查询的查询运算符。

Read Reflections on MongoDB to learn how Collective Idea has made the switch.

阅读MongoDB思考，了解业界观念如何转变。

But for applications that require high performance throughput and a flexible data model, MongoDB could be worth a look.

但是对于那些需要高性能流量和灵活数据模型的应用程序来说，MongoDB值得一看。

To get other administration information, you can also run the following commands in the MongoDB shell

为了获得其他管理信息，也可以在MongoDB shell中运行以下命令

In the MongoDB shell, it is very easy to update documents.

在MongoDB shell中，更新文档非常容易。

Learn more about the MongoDB map/ reduce functions.

了解有关MongoDB map/reduce函数的更多信息。

If the database does not exist, MongoDB will create it as soon as you add any data to it.

如果数据库不存在，在您将数据添加到数据库时，MongoDB将会创建它。

MongoDB's query engine also makes it very simple to apply aggregation and group functions on your data.

MongoDB的查询引擎也使得对数据应用聚合和分组函数变得非常简单。

You can easily replicate this functionality in MongoDB using the skip and limit functions.

您在MongoDB中只需使用skip和limit函数即可实现这一功能。

Some, like mongodb, help to develop open source technologies.

一些工具，比如MongoDB，能够帮助开发开源技术。

You are now connected to your local MongoDB server, and in particular, the "test" database.

您现在已连接到本地MongoDB服务器，尤其是“测试”服务器。

A MongoDB based Repository could be a simple approach to provide persistence in projects based on DDD.

在DDD的项目里，基于MongoDB的仓库能方便地用于提供持久化功能。

MongoDB is now set up and ready to use.

MongoDB现在设置完成并准备使用。

Included with the MongoDB distribution is a shell application that allows you complete control over your databases.

MongoDB发行版包含一个shell应用程序，使您能够完全控制数据库。

With this application, I'm going to first capture some information from Twitter and store it in MongoDB.

通过此应用程序，我将首先从Twitter捕获一些信息并将其存储在MongoDB中。

To delete data in MongoDB, you use the remove function.

要删除MongoDB中的数据，可使用remove函数。

MongoDB supports a variety of conditional operators, including

MongoDB支持各种条件运算符，包括

Morphia automatically creates this field to record the type of the object in MongoDB.

Morphia自动创建此字段以便记录MongoDB中的对象类型。

This will start the MongoDB database server as a foreground process.

这将作为前台进程启动MongoDB数据库服务器。