For some unknown reason, many were discarded, often still intact, and thousands have been found all over the Near East.

由于一些未知原因，很多被丢弃的物品还是被完整地保存下来了，而在近东的各地有上千件这样的物品出土。

youdao

He was trying, for some unknown reason , to count the stars.

不知何故，他试图数星星。

《牛津词典》

Several years ago a rare species of bird for some unknown reason.

几年前，因为某种无人知晓的原因，这种稀有的鸟绝迹了。

youdao

The Republicans, for some unknown reason, decided to pass on fully emulating that system year.

FORBES: Obama's Not-So-Secret Weapon: Will He Use It to Help Power His New Mandate?

For some unknown reason, it tries to force me to use Albany, NY as my departure airport for every search even though I do not live near Albany and have never flown in or out of the airport.

FORBES: Google Flights? Not Ready For Prime Time.

Tobey Maguire, looking ever more costive and uncomfortable, returns as Peter Parker, who finds himself doubly transformed first into the crime-busting arachnid whom we know and revere, second into a black-suited alternative who revels in violence and, for some unknown reason, keeps breaking into dance moves.

NEWYORKER: Spider-Man 3