He had made a thorough investigation. No wonder he knew so much about it.

　　他對此事做了徹底的調查，怪不得他了解得那么多。

　　No wonder you can't find anybody here; they're all away at a meeting.

　　難怪找不到人，都開(kāi)會(huì )去了。

　　No wonder she looks so familiar; she is my former student.

　　她是我過(guò)去的學(xué)生，怪道覺(jué)得很眼熟。

　　The door was locked, so it's no wonder you couldn't open it.

　　門(mén)是鎖著(zhù)的，無(wú)怪你打不開(kāi)。

　　No wonder her fingers are stained brown, she smokes like a chimney.

　　她煙抽得很厲害，難怪她的手指都熏黃了。