On one occasion, she called me in the middle of the night.

有一次她深更半夜打电话给我。

《牛津词典》

On one occasion, an actual storm passed over head during the show.

有一次，一场真正的暴风雨在表演期间从头顶掠过。

youdao

And only on one occasion have I ever felt frightened.

只是有一次把我吓坏了。

youdao

"It has become increasingly clear that Tony Blair misled parliament on more than one occasion and I think that MPs were invited to make their own judgment on the merits of the case for war and they were entitled to do so on the truth and it looks very much as though that the truth was withheld from parliament and many MPs may well have made a different decision if they had had the full unvarnished truth,".

VOA: standard.2009.12.13

Ms Smith said she had no previous convictions but she had been cautioned on one occasion.

BBC: Prestatyn fire deaths: Melanie Smith lie detector offer

On one occasion the employer forced a cane into the maid's mouth, bruising her gums.

CNN: Malaysia's Secret Vice

They also allegedly armed themselves with weapons including sledgehammers, crowbars and on one occasion, a gun.

BBC: North London 'smash and grab gang stole ?1m of goods'