Natural geniuses, however, are not common.

然而，天才并不常有。

youdao

My dad forgot that here is China, and tipping is not common.

我爸爸忘了这里是中国，而在这里给小费并不常见。

youdao

This is not common.

不过这不是太常见。

youdao

This is a common problem for millions of children around the world and not just at school, but also at home.

VOA: special.2009.12.21

Smallpox affected world history hundreds of years ago, and it was a disease that was common in Europe, but not common in the Americas until the Americas were colonized.

天花影响了几个世纪前的历史,这种病在欧洲很常见,但在美国不多见,直到美国成为殖民地

耶鲁公开课 - 生物医学工程探索课程节选

So I claim it's not common knowledge.

我说这不是共同知识

耶鲁公开课 - 博弈论课程节选

In short, U.S. wars were to be few and winnable, not common and interminable.

FORBES: The Proliferation of Illegal Wars Erodes American Values

Surveillances, especially mobile surveillances are not common or easy and only used for important investigations.

FORBES: What Should You Do If You Suspect A Car Has Been Following You?

He is known to speak his mind with a bluntness not common in diplomatic circles.

NPR: Bush Nominations Contradict 'Charm Offensive'