救命!on board The hook release mechanism is powered by an on board proprietary hydraulic power unit．这句话中,hook release mechanism 的意思是钩分离装置,is powered by 就是 由...驱动,proprietary是 '专属的' 的意思 ,hydraulic

救命!on board The hook release mechanism is powered by an on board proprietary hydraulic power unit．这句话中,hook release mechanism 的意思是钩分离装置,is powered by 就是 由...驱动,proprietary是 '专属的' 的意思 ,hydraulic 1.put up your coat on the hook.2.put up the notice on the bulletin board.没有up行吗?什么情况下有up? ON HOOK hook on hung his coat on the hook.hung on the board,on board, on a board ,ob board的区别大神们帮帮忙 on 还有on the board,on a notice board laden on board the vessel 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 on the board of he is the representative on the board of directors hook up the off the hook Off The Hook 歌词