What one community knows, all know (at least over decades, if not centuries).

只要一个社区知晓，其他的社区也都会知道（这个过程如果不是花费数个世纪的时间，就是数十年）。

youdao

According to estimates, this area of northern Ukraine will be uninhabitable for decades, if not centuries.

据估计，乌克兰北部的这块区域在几十年甚至数百年内都不适于居住。

youdao

The report also concluded that salmonella has been around American kitchens for centuries now, and must therefore be at least harmless, if not actually good for us.

报告还推断说沙门氏菌已经遍布美国的厨房有上百年了，即使它们是对我们没有好处，那最起码也是无害的。

youdao

And second, the new and growing boom in hydrocarbon production in the United States and elsewhere promises to push peak oil decades, if not centuries, into the future.

FORBES: Face It: Automakers Relegating EVs To Perpetual Niche Status

"It's nothing new --- humanity has been facing these problems for centuries, if not millennia, " he said.

CNN: Medvedev: Russia is open for business

In music, if not in business, Mr Sacher was a man for all centuries.

ECONOMIST: Paul Sacher