免费控制工具，以及在它们基础上自行开发的系统，只为检查文件的输入输出提供了初步的支持。
Free source control tools, and the homegrown systems based on them, provide only rudimentary support for checking files in and out.
文本文件的配置方式使得不通过特殊的系统工具就可以完成配置文件的备份、检查和编辑工作。
Text file configuration makes it easy to back up, examine, and edit configurations without using any special system tools.
错误检查工具扫描硬盘的坏扇区，并扫描文件系统错误，检查是否某些文件或文件夹是错误的。
The Error Checking utility scans the hard drive for bad sectors, and scans for file system errors to see whether certain files or folders are misplaced.
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