It may seem a strange story but it rings true to me.

这个故事也许显得离奇，但我却觉得很真实。

《牛津词典》

Strange to say, however, what everyone knows isn't true.

然而，说来奇怪，众所周知的事未必就是真的。

youdao

It may sound strange, but it's true.

听起来也许奇怪，但那是真的。

youdao

Strange,but true.

虽奇怪，但却是事实。

哈佛公开课 - 幸福课课程节选

And now strange but true developments in the world of animal research.

NPR: Mole-Rats, Ants Making Science Headlines

Strange but true: the euro is worth almost as much today as it was a month ago, despite all the dramas in Greece and Italy.

BBC: Time to buy euros?

Strange but true, ARM is currently winning the microchip World Series: some 8bn ARM-designed chips will be sold this year, and are in everything from tablets, to smartphones to televisions and fridges.

BBC: If growth's the problem, are more ARMs the answer?