未经

zhè xiāo xi wèi jīng guān fāng zhèng shí

这消息未经官方证实。

The news is not yet official.

wèi jīng diào chá jiù xiāng xìn tā suǒ shuō de yī qiè shì bù míng zhì de

未经调查就相信她所说的一切是不明智的。

It would be unwise to take everything on trust from her.