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。

On one occasion, he threatened to sic his dogs on a reporter.

有一次，他威胁要驱使他的狗去袭击一名记者。

On one occasion, I told the secret cousin.

有一次，我把这个秘密告诉了表哥。

And only on one occasion have I ever felt frightened.

只是有一次把我吓坏了。

On one occasion, he landed in a deserted car park.

有一次，他在一个废弃的停车场着陆。