They simply piggyback on the traditional Medicare program, relying on the same doctors and hospitals while using their subsidies to offer cost savings or extra benefits to enrollees.是什么意思_They simply piggyback on the traditional Medicare program, relying on the same doctors and hospitals while using their subsidies to offer cost savings or extra benefits to enrollees.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句