When we handle a great number of items, we need a system to categorize them for easy reference, like we use Cardex for business cards, paper file for documents, albums for photos.是什么意思_When we handle a great number of items, we need a system to categorize them for easy reference, like we use Cardex for business cards, paper file for documents, albums for photos.在线翻译_英语_读音_用法_例句