Hello, it's us back again.
嘿！我們又回來了。
Hello? You didn't really mean that, did you?
嘿？你不會真是那個意思吧？
He popped his head around the door and said hello.
他從門后探一探頭，打了聲招呼。
Don't be shy ─ come and say hello.
別害羞——過來問個好。
We were passing through, so we thought we'd come and say hello.
我們路過此地，所以想來問候一聲。