【明報專訊】地鐵車廂內看到這兩項呼籲：「聽到叮噹，先落後上。」和「聽到嘟嘟，立即停步。」而英文版是這樣的：When you hear "DING-DONG", please let passengers exit before boarding.和When you hear "DO-DO-DO", please stop.
這是明報教育網-訂戶專區，進入本區前，請先登入系統．．．
