同样地，罗说到，一些曾到过很多地方的中国人也已经开始认识到本国旅游业的广阔前景。

Similarly, Luo says, some Chinese who have traveled widely have also begun to realize their own country's vast potential for tourism.

youdao

两年多前，我曾到过这里一次。

I was here once over two years ago.

youdao

不是。两年多前，我曾到过这里一次。

No. I was here once over two years ago.

youdao

I once went to visit the summer palace that he created and that Nicholas II loved so much there.

我曾到过他修建的夏宫看过,据说尼古拉二世特别喜欢那个地方

耶鲁公开课 - 欧洲文明课程节选

I mentioned previously that we do not know a lot about how the mechanical stimulation is being converted into chemical and electrical energy.

先前我曾说过,对于机械刺激到化学和电能的转换,我们还知之甚少。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

I've seen students photocopy exams down to the size of a postage stamp.

我曾看到过学生将考试内容复印到,一张邮票大小的纸上。

麻省理工公开课 - 固态化学导论课程节选