The playground 'gives every appearance of' being a safe place for children [=the playground appears to be a safe place for children], but a tragic accident occurred there recently.
He has announced that this will be his final/last 'appearance' with the band. [=the last time that he will perform in public with the band]
I wasn't expecting him to come and was surprised by his sudden 'appearance'. [=I was surprised when he suddenly appeared/arrived]
(..) The plane wssn't a wedding present. lt belongs to the British government. They want aerial maps of the whole of North Africa. So l think he's in Ethiopia. ln csse you're counting on his sudden appearance. And the marriage. ls that a fiction? No, the marriage isn't a fiction. Oh, thank God. (..)1996 The English Patient