They were investigating cause in the orgin.

他们正在调查造成起火的原因。

youdao

There are several versions of this song's orgin .

关于这首儿歌的起源，有几种不同的版本。

youdao

We cannot say it must be endometrial orgin because this is endometrial biopsy.

尽管这是内膜活检但是我们不能肯定是内膜原发。

youdao