The trend shows that, the ratio of cost to population was declining, and of cost to economy firstly went up and then fall, this change comply with the law of economics.是什么意思_The trend shows that, the ratio of cost to population was declining, and of cost to economy firstly went up and then fall, this change comply with the law of economics.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句