大牧场
3.Their energy structure and conversion efficiency were analysed systematically and calculated:solar radiation→grass above ground 0.037%,grass above ground→livestock herd 51.10%,livestock herd→family range 2.15%,family range→ranch 61.61%,ranch→ out-ranch 13.88%.
5.An extensive farm, especially in the western United States, on which large herds of cattle, sheep, or horses are raised.


