The curly braces are then the c's way of kind of making a puzzlepiece that looks like this so you can put stuff inside.
花括号是C语言的一个方式，用来做一个像这样的程序块，所以你可以把代码写在里面。
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Pakistan is an artificial puzzlepiece that, unlike India, has no logical frontiers, so different, territorially based ethnic groups exist uneasily together.
In that situation, it relies on the pluginurl and pluginspage attributes to display an image broken puzzlepiece that can be clicked on to install the plugin.