Expansion board: A component added to a computer system in order to enhance its capabilities.Expansion boards,also known as add-on board, may provide the user with additional memory,graphics, colour, communications features,etc.

• 扩展板:加入电脑以增加它的能力的辅件。它可以给与使用者额外的存贮量、美术、颜色、通信竺特色。