我见过一次，是发射器，不是记忆棒。

I've seen one before. The launcher, not the memory stick.

youdao

我在罗马逗留期间只见过她一次。

I only saw her once during my stay in Rome.

《牛津词典》

我见过蜜凯拉一次，时间很短。

I met Miquela once, briefly.

《柯林斯英汉双解大词典》

I think it's the biggest premiere I've ever been to. It was amazing.

我想那是我见过的一次最大的首映会了。那太壮观了。

关于莱斯特广场 - SpeakingMax英语口语达人