形式发票 xíngshìfāpiào pro forma invoice Origin Definitions Defs Strokes Stroke Words Sentences Sents 形式 xíngshì noun form the external manner, style, or method of presentation, especially as contrasted with content 内容 nèiróng; formal发票 發票 fāpiào invoice invoice; receipt; bill; official receipt issued by a seller for goods and services purchased