The authorities moved him to the less rigid regime of an open prison.

当局把他移送到管理相对宽松的不设防监狱。

《柯林斯英汉双解大词典》

In American society, however, the class structure was less rigid; some people changed occupations easily and believed it was their duty to improve their social and economic position.

然而，在美国社会，阶级结构没有那么严格；有些人很轻易地就改变了职业，并认为提高他们的社会和经济地位是他们自己的责任。

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They are dumping huge long-term deals in favour of smaller, less rigid ones.

他们放弃大型长期交易，而喜欢更小不严格的交易。

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But in Norway, where pop music tastes are less rigid, he's a pop star.

NPR: Norway's Sondre Lerche, a Pop Find for Americans

Now we have neo-modernism which embraces a less rigid, more emotive expression of modernist.

BBC: Windows 8 and the Surface tablets: The experts weigh in

That, plus a less rigid, more entrepreneurial economy, may help this marginalized demographic succeed.

FORBES: Magazine Article