但是只要你的员工踏出工厂大门，他们面对的就是一个完全不同的环境。
But as soon as your employees step outside the gates, they face a completely different atmosphere.
明显的理由是：你一天廿四小时都面对不同的环境。
The reason is obvious: You face circumstances twenty-four hours a day.
异构环境的管理员所面对的一个主要挑战是跨不同系统拥有统一的用户ID和密码，最好具有集中的身份验证服务器。
A major challenge for administrators with heterogeneous environments is to have uniform user IDs and passwords across different systems, preferably with a centralized authentication server.
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