Hello, it's us back again.

　　嘿！我們又回來(lái)了。

　　Hello? You didn't really mean that, did you?

　　嘿？你不會(huì)真是那個(gè)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(lái)問個(gè)好。

　　We were passing through, so we thought we'd come and say hello.

　　我們路過此地，所以想來(lái)問候一聲。