同比和环比怎么用英语说！

同比
From Sep., the year to year PPI grouth will sharply narrowing.
从9月开始，工业产品出厂价格指数的同比增长将大幅收窄。
环比
PPI has increased for continuous 5 months and a month to month growth of 0.8% in this month.
工业产品出场价格指数已经联系5个月增长，并在本月有0.8%的环比增长。