peering (v) 端详
He is peering himself.

{Peer} is an intransitive verb. We always use {peer at}.

He is peering [at] himself.

They are peering the animals.
The same reason mentioned above.
They are peering [at] the animals.

They are peering everything in the museum.
The same reason mentioned above.
They are peering [at] everything in the museum.