尤其汹涌爆发的“红色代码”、“蓝色代码”及“尼姆达”病毒，使人们更加深刻的认识到了网络安全的重要。
Especially, when the turbulent outbreak of the virus of Code Red, Code Blue and Nimda, it makes people get a clear awareness of the importance of the safety of network.
添加代码以在图像的50x, 50y位置绘制一个蓝色圆。
Add the code to draw a blue circle on the image at position 50x, 50y.
和37是分别用于指定蓝色和白色的Bash转义代码。
The 34 and 37 are the Bash escape codes for specifying the colors blue and white, respectively.
请参阅下面用蓝色突出显示的附加代码。
就像被显示在图2中的例子，被遗漏的代码行被用红色突出出来(被访问的代码行用蓝色标识)。
As shown in the example in Figure 2, missed lines are highlighted in red (and hit lines in blue).
例如，如果选择“顶”作为选定的边缘、“实线”作为样式、“蓝色”作为颜色，则添加以下代码。
For example, if you select Top as the selected edge, Solid Line as the style, and Blue as the color, the following code is added.
这样就可以在Firebug窗口上看到该HTML元素(被蓝色方框围绕)和html源代码。
You should see that HTML element, surrounded by a blue rectangle, and the HTML source in the Firebug window. Figure 3 shows an example.
用浅蓝色突出显示的代码行已在测试运行中执行过，而用红褐色突出显示的代码行则还没有执行过。
Lines that are highlighted light blue were exercised in the test run, and lines that are highlighted reddish brown were not.
这时，你就可以编译运行代码了，如果一切正常，你会看到在蓝色的背景里有一个黑色的矩形。
At this point, you can compile and run the code. If everything is correct, you should see a black rectangle on a blue background.
这时，你就可以编译运行代码了，如果一切正常，你会看到在蓝色的背景里有一个黑色的矩形。
At this point, you can compile and run the code. If everything is correct, you should see a black rectangle on a blue background.
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