There exist, however, many problems in our social welfare sysytem.There are too much differences between country and urban welfare security and lower coverage rate.是什么意思_There exist, however, many problems in our social welfare sysytem.There are too much differences between country and urban welfare security and lower coverage rate.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句