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

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。

Getting started with MongoDB couldn't be easier, especially because it offers downloads for target operating systems.

MongoDB入门再简单不过了，尤其因为其为目标操作系统提供了下载。

Note that in MongoDB, my tickets collection did not need to be created beforehand.

请注意在MongoDB中，我的tickets集合无需提前创建。

Why replace an aircraft that you cannot make fast enough?

所以为什么要用不能迅速投产的飞机来替代现有机型 呢 ?

Objective To evaluate and generalize the application of intermaxillary fixation screw in the jaw fracture.

目的评价和总结颌间结扎钉在治疗颌骨骨折中的应用.

Accurate and stable outlet flow rate can be obtained by adjust the screw in precursor valve.

只需调节导阀的调节螺钉,就能获得精确、稳定的出口流量.

SUN HYDRAULIK GMBH offers Offers to Screw-in valves , Globe valves and Valve housing.

提供轴承箱、轴承体、阀体、阀箱、阀套、阀门外壳及其它产品.

Install the screw in the trim panel depression.

安装饰板压低处的螺钉.

The distance traveled by a machine screw in a single revolution.

表示单个语义的一种书写码或机器码.