before your very eyes

If something surprising happens before your eyes or before your very eyes, it happens directly in front of you.

如果某件令人惊讶的事情before your eyes 或是before your very eyes地发生了，那么就是说它就发生在你眼前。

Then, before my very eyes, she disappeared.
接着，她就从我眼皮底下消失了。