year-over-year 与year-on-year

year-over-year 与year-on-year的含义相同，都是用于比较上年同期的财务业绩，可以是一年，也可以是一季度的或一个月的同期对比,如：

year-over-year的用法, （美国用的较多）

Earnings per share are up 10% year over year.

每股收益同比增长10%。

Profits were down 11% on a year-over-year basis.

利润同比下降11%。

This is the 12th straight month in which monthly sales have declined, year-over-year.

这是连续第12个月销售额同比下降。

This would lower the year-over-year rate from 3.7% to 3.0%.

这将使年增长率从3.7%降至3.0%。

That&39;s up from only 96 million a year ago -- a 52 percent year-over-year increase.

这比一年前的9600万有所上升——同比增长52%。

Year on year用法与year-over-year类似，但频率不如后者，前者英国用的较多

Revenue was up 59% year-on-year, and daily active users were up 17%.

营收同比增长59%，日活跃用户同比增长17%。

But brokers say the year-on-year decline in sales volume is largely due to a lack of supply.

但经销商表示，销量同比下降主要是由于供应不足。

Media costs will definitely increase on a year-on-year base.

媒体成本肯定会同比增长。

In fact individual birds do almost exactly the same thing every year -- arriving punctually at the same time year-on-year.

事实上，每只鸟每年都做着几乎完全相同的事情——每年准时到达同一时间。

The main site today has around 2 million unique visitors per month, and it has grown by about 50 percent year-on-year.

现在的主网站每月有大约200万独立访问者，同比增长约50%。

That represents a year-on-year decline of nearly 12 percent.

这意味着同比下降近12%。