If poll is called in a loop, these expensive system calls involved in polling can dramatically affect the overall performance when a large number of file descriptors are monitored.

在监视大量文件描述符时，如果在循环中调用poll ，poll所涉及的这些高成本的系统调用会严重影响总体性能。

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The action of the game, which includes moving graphical objects around the screen and polling for user input, is synchronized by the built-in XNA game loop.

游戏的行为，包括在屏幕的周围一些移动的图像对象，还包括一些等待用户的输入，在XNA这些都可以做到同步。

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The action of the game, which includes moving graphical objects around the screen and polling for user input, is synchronized by the built-in XNA game loop.

游戏的行为，包括在屏幕的周围一些移动的图像对象，还包括一些等待用户的输入，在XNA这些都可以做到同步。

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