现在已14年，曾经在一段时间出现的症状。

It has now been 14 years and once in a while the symptoms occur.

youdao

我曾经在中国生活了一段时间和我爱中国。

I once lived in China for a while and I love China.

youdao

你曾经在中国住过一段时间吗？

Have you ever lived in China for some time?

youdao

你曾经在中国住过一段时间吗？

Have you ever lived in China for some time?

youdao