The retail price index (RPI), which includes mortgage interest payments and is used for many pay negotiations, fell further into deflation.It dropped to -1.2% last month, from -0.4% in March.是什么意思_The retail price index (RPI), which includes mortgage interest payments and is used for many pay negotiations, fell further into deflation.It dropped to -1.2% last month, from -0.4% in March.在线翻译_英语_读音_用法_例句