an agreement that is not in writing and is not signed by the parties but is a real existing contract that lacks only the formal requirement of a memorandum to render it enforceable in litigation是什么意思_an agreement that is not in writing and is not signed by the parties but is a real existing contract that lacks only the formal requirement of a memorandum to render it enforceable in litigation在线翻译_英语_读音_用法_例句