I have seen him once in London.

我在伦敦见过他一次。

youdao

He told me once over dinner in London at the beginning of the conflict in Iraq that he was under no illusions that experience could remove risk.

伊拉克冲突开始时，他曾在伦敦跟我一起吃饭时说他从未幻想过他所经历的一切能使自己远离危险。

youdao

Setting a new record, the world's most expensive burger is available at just one restaurant in West London, England, once a week — but it will eventually be available to order via a hotline.

在汉堡包历史上创造了新的记录，这种世界最贵的汉堡包目前只在英格兰的西部伦敦一家餐馆中销售，并且是一周一次，但是将来有望通过热线电话订购到。

youdao

Once in London, Keith cut back on the beer swilling and got his degree in 1977.

FORBES: My Brother-in-Law, The Designer

Viewers outside the U.S. "I was once recognized in London by a guy who worked in Kazakhstan, " she laughs.

CNN: PEOPLE

He once ran the London Marathon in memory of a colleague who had been murdered by her ex-partner.

BBC: Toby Day