Witnesses said that two people were killed, but those accounts could not be confirmed.

目击者说两人遇害，但那些说法都没法得到证实。

《柯林斯英汉双解大词典》

That's a huge difference, and it should have been confirmed, but it was not.

那是一个巨大的差异，它应该得到证实，但它没有。

youdao

It is a subject he chooses not to discuss, but others confirmed the incident.

这是释德建故意选择回避的话题之一，但其他人证实确有其事。

youdao

The new study confirmed a link, but did not find evidence that the C-reactive protein causes the disease.

VOA: special.2009.07.15

The U.S.military has confirmed the authenticity of the video but not the identity of the two men.

VOA: standard.2010.04.06

Clapper is known for being blunt and direct. His manner has won praise in the military, but some of the lawmakers who will decide whether he is confirmed say he is not cooperative enough.

VOA: standard.2010.06.05

It is believed, but not confirmed, that Apple has come to an agreement with several major labels, including Universal Music, to launch a streaming service which has been informally dubbed "iRadio".

BBC: Spotify begins Latin America push with Mexico launch

Alexis Herman has been nominated but not yet confirmed for that post.

CNN: Clinton Commission To Craft Health 'Bill Of Rights'

Mokhtar Belmokhtar's death was announced on Chadian state television but has not been confirmed by other sources.

BBC: William Hague in Mali for talks on security talks