acre是什么意思？

The castle, which is located on 11,700 acres, was leased to members of the royal family between 1848 and 1970, including King Edward VII and George V.

At other times the cow wandered around the 526 acre park and the artificial grass field normally used for human sporting events.

It is polluting millions of acres of cropland.

Facing water shortages and escalating fertilizer costs, farmers in developing countries are using raw sewage ( ' , 下 水道污水) to irrigate and fertilize nearly 49 million acres of cropland, according to a new report—and it may not be a bad thing.

One acre of farmland use to for raising cows can produce 250 pounds of beef.

One acre of farmland use to for crop production can produce 1,500 pounds of tomatoes

The national average farm size is around 440 acres, but his is only one acre.