laden on board the vessel

laden on board the vessel Smoking is not allowed on board the aircraft.board不是v.或n.on后面怎么会有board,为什么不直接是on the aircraft? on the board,on board, on a board ,ob board的区别大神们帮帮忙 信用证要求出CLEAN ON BOARD OCEAN B/L,船公司出的提单标识是LADEN ON BOARD这样可以吗在? on 还有on the board,on a notice board on the board of directors on the board和on board的区别, get on board the train的board是什么词? I got on board the plane 翻译 board wall the is a There on on board 到底是什么短语?为什么能说on board the ship和go on board the ship 还有 the people on board Al Qaeda on the ropes?Little Arab outrage over Osama bin Laden's death. on the board of he is the representative on the board of directors I can write on the board with my hands .write on the board（划线提问） on board,on the board这两个词组有什么区别, to board the train 跟 get on the train 还可以去 board 什么东西. on the back of the systerm board怎么理解 Is it the news ____Bin Laden was shot dead____is being broadcast on TV now?该空都填that,为什么