Unlike most other Mach-based operating systems, such as GNU HURD (which, contrary to popular belief, does exist), XNU implements UNIX system calls in the same way as a BSD system.
不同于大部分基于Mach的操作系统，比如GNU HURD（与人们以为的恰恰相反，它的确存在），XNU采用与BSD系统相同的方式来实行UNIX系统调用。
As of 2005, Hurd is in slow development, and is now the official kernel of the GNU system.
截至2005年，赫德是在发展缓慢，现在的GNU系统正式内核。
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