请问currency board和currency board system的区别

请问currency board和currency board system的区别 System board 和motherboard 的区别 monetary和currency的区别 currency 请问提单上ship on board 和clean on board的区别 请问提单上ship on board 和clean on board的区别. Currency symbol 和 Currency code 有什么区别 on the board和on board的区别, on board和on board的区别及用法, currency和money有何区别? board和bored的读音区别 请教board和committee的区别?