Because the passwd program cannot be written to by the user, and is very constrained in what it allows the user to do, this setup is usually safe.

因为用户不能编写passwd程序，而且它对允许用户执行的操作有严格限制，所以这个设置常常是安全的。

youdao

You could always be anything you wanted to be if you worked hard. And so I never felt constrained. I never felt that there were limitations on what I could do.

只要努力，你可以成为任何你想要成为的人，我从不觉得自己受限，我从不觉得我能做的事受到限制。

youdao

I will never be by violence constrained to do anything.

我永远不会被强迫去做任何事。

youdao

Do we trust ourselves to be constrained to only socially accepted mapping the human genome?

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"I would love to be able to come up with a way that we can do much larger scale translations, but remember we are constrained by this 160 character text message limit, " said Dr Eagle.

BBC: New service is all in a day's SMS