英语语法分析

Ranchers are testing electronic tags on animals' ears to create a national cattle-tracking system.

牧场主正在检测动物耳朵上的跟踪器，以建立一个全国性的家畜跟踪系统。

《柯林斯英汉双解大词典》

The biggest obstacle is the ranchers themselves, whose cattle compete with prairie dogs and bison for grass and space.

最大的障碍是牧场主自己，他们的牛与土拨鼠和野牛争夺草地和空间。

The vast grasslands of the High Plains in the central United States were settled by farmers and ranchers in the 1880s.

在19世纪80年代，美国中部的高地平原大草原是由农民和牧场主开垦的。