Two- and three-dimensional maps are helpful tools in planning excavations, illustrating how sites look, and presenting the results of archaeological research.

二维和三维地图是规划挖掘工作的有用工具，可以描绘遗址的外观，并展示考古研究的结果。

youdao

But these three methods are very helpful in letting you know exactly what the problem is and where that problem occurred.

但是，这三种方法可以帮助您确切地知道问题是什么以及问题发生在何处。

youdao

As a bit of helpful trivia, each application is initially opened with three file descriptors, 0 through 2, for the standard input, output, and error streams, respectively.

有一点不是很重要但却很有帮助，初始打开每个应用程序时，都具有三个文件描述符，从0到2，分别表示标准输入、输出和错误流。

youdao

We decided that choosing gadgets in three "budget" ranges would be most helpful to you, the reader, and we've chosen a kit of gear we think any student would do well to grab up for each -- covering laptops, netbooks, mobile phones, e-readers, laptop bags, and so on.

ENGADGET: 's back to school guide

In our training workshops, one particularly helpful exercise asks participants to deliver a three-minute adventure story with a moral.

FORBES: How to Craft an Elevator Speech That Makes a Big Impact

Each kit includes a handle, three blades and shaving cream, and comes with a set of humorous but helpful shaving instructions.

WSJ: Fresh Picks: Stylish Timekeepers and Cutting-Edge Razors