annual average value

The annual average value of rain acidity and frequency are both good in 1999 and 2000, but get worse subsequently.

1999年和2000年酸雨年均酸度及频率情况都较好，之后出现反弹；

But optimising value? At $450m, the estimated price tag is little more than Phibro's average annual net profit in recent years.

但4亿5千万也算增加价值么?这个数仅仅比这几年菲布罗年平均净利润高一点。

Compensation for expropriated of cultivated land shall be six to ten times the average annual output value of the expropriated land, calculated on the basis of three years preceding such requisition.

征收耕地的土地补偿费，为该耕地被征收前三年平均年产值的六至十倍。