Stepfamilies are rapidly becoming the norm, not the exception.

重组家庭正迅速变得司空见惯，不再是个例外。

《柯林斯英汉双解大词典》

Often it's the rule and not the exception.

通常这无一例外的成了一条不成文的规则。

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This seems to be the rule, not the exception.

这看起来像规则而不是例外。

youdao

For some others it might mean being basically restricted to the home, if not all the time, then the only exception being in public, in the company of a close-male relative as chaperon.

在一些别的地方可能意味着,基本上深居简出，即使不是一天到晚，也只有外出是例外，而且必须有一个男性近亲作监护人陪同。

普林斯顿公开课 - 人性课程节选

Lyon became the capital of French gastronomy and not Paris; but, that's almost the exception.

里昂是法国的美食中心,而不是巴黎,这差不多算是个例外

耶鲁公开课 - 1871年后的法国课程节选

Well, first of all, you may not survive for long, if you truly don't accept the fact that things, people being no exception fall when left in mid-air.

首先，你可能活不长，如果你不接受，人会从半空中掉下来的事实。

哈佛公开课 - 幸福课课程节选

Sitting here in China, of course, headlines like this are the rule, not the exception.

FORBES: Beyond Beijing: The Recovery in U.S. Autos

Conversations about end of life need to become the norm and not the exception.

FORBES: Do Conversations Around End Of Life Really Matter?

So, when one sees the seemingly craziness of the market, it is the norm and not the exception.

FORBES: Wise Up: 'Normal' Market Behavior Is Not Normal But Crazy Is