Unix操作系统(可供多人同时使用);
例句:
Some UNIX system operations must be performed at the console.
一些UNIX系统的操作必须要在控制台运行.
The Unix operating system is scalable, reliable and performs well.
Unix操作系统可扩缩 、 可靠、性能也好.
If you run Unix you can download the source file.
如果你运行Unix,你能下载源代码.