The only technology involved here is this cheap electric fencing: relatively new, hooked to a car battery; even I could carry a quarter-acre paddock, set it up in 15 minutes.
这里唯一进化的科技就是廉价的电网， 比较新，与一块汽车电池相连。 即使是我也能够围成一个四分之一亩大小的围场，在15分钟内安置完毕。