这是用Tagul制作的一个标签云的例子。试用了一下，它只能处理英文文档。

图中的vacuum是“真空”，transport是“运输”，pipeline是“管道”，另外图中还有New York和Beijing。文章的标题是“New York to Beijing in two hours?”。如果再看一下原文内容，觉得标签云中标注的效果还是挺好的。标签云不只是把一些文字以一种特别的方式表现出来，它对于我们理解一些文字内容应该还挺有用的。

下面是用同样的内容不同的工具做的几张图。

上面的图来自下面方字：（来源：http://english.peopledaily.com.cn/202936/8336090.html）

Future "capsule" Hyperloop

Getting on the train in Beijing early in the morning, and getting off at New York to go to work, and in that evening you can go back to Beijing. This will soon be entirely possible in the future.

A U.S. company is developing a vacuum pipeline transportation system which will enable us to travel from Beijing to New York in only two hours and even around the world in only six hours.

Elon Musk proposed "Hyperloop" concept

The "Evacuated Tube Transport" idea was originally put forward by mechanical engineer Daryl Oster in the 1990s, and in 1997 he received the technology patents.

Elon Musk, the co-founder and CEO of electric car maker Tesla, as well as the private space company SpaceX proposed a "hyperloop," and contributed more design details to the concept of this transport. ET3 company's vacuum pipe transportation project is also based on this idea.

Musk announced the plan in this year's technology conference. He said that the system will not crash and is very safe, and can deal with a variety of complex weather. It's three to four times faster than a bullet train, and can achieve twice the current speed of airplane.

Put visitors in the "capsule" and shoot to destination

Recently, the Colorado-based company called "ET3" is constructing a three-mile long, up to 4,000 miles per hour vacuum pipeline transportation system. Daryl Oster, who is responsible for the detail design, is a mechanical engineer in Florida. In order to concentrate on research and development, the Oster couple resigned from other jobs where they can get a higher salary.

ET3 company is committed to developing a "high-altitude pipeline" project envisioned by the designer. It can reach 6,500 kilometers per hour. Passengers sit in the vacuum line can go from New York to Los Angeles in only 45 minutes; a trip from New York to Beijing only takes two hours, and for a global tour it takes six hours.

According to designer, this high-altitude pipeline transportation is like a "capsule". Each capsule is placed in the pipeline, and launched to the destination as artillery shells.

To give the public more information, the company published more details of the "capsule" design on the website: each "capsule" weighs 183 kilograms, with length of 16 feet (4.87 meters), can accommodate 4 to 6 passengers, and there is luggage compartment. The pipeline that connects the two destinations will be built on the ground, the same as high-speed railway.

Frictionless, cheaper, more environmentally friendly

Designers said the project is powered by magnetic levitation technology. The whole shuttle is in an almost frictionless environment, emitted from a certain ejection device, and drive to the destination without interruption. Although the vacuum pipe transport can reach incredible speed, passengers can only feel a small acceleration forces.

Designer said vacuum tube transport is a mode of transport without air, without friction, safer, cheaper and quieter than trains and planes.

In terms of travel costs, ET3 company said, compared to the expensive plane ticket prices, they are able to cut travel expenses from San Francisco to New York City to 100 U.S. dollars. This is because the cost of the vacuum pipe transport is very cheap, only a quarter of that of highway, and one tenth of that of high-speed rail. In accordance with the expected plan, this pipeline may be "attached" to the existing high-speed railway bridge on the route in order to save resources and infrastructure costs.

This means of transport is cleaner and environmentally friendly. Designer said vacuum tube transport is less energy consuming than any other traditional means of transport, and vacuum tubes transport carries more than 50 times traffic per kilowatt-hour than train.

对标签云有兴趣的话，可以试用一下下面推荐的工具。下文转自：http://www.cnblogs.com/chu888chu888/archive/2012/01/02/2310248.html

 9个优秀网上免费标签云生成工具