Kangaroos compete with sheep and cattle for sparse supplies of food and water.
袋鼠与绵羊和牛争夺为数不多的食物和水的供应。
The robots are equipped with many sensors to identify conditions of the environment, cattle and food, using thermal and vision sensors that detect changes in body temperature.
这些机器人配备了许多传感器，用于识别环境、家牛和食物条件，使用热敏传感器、视觉传感器来检测体温变化。
American agriculture officials point out there have only been two documented cases of mad cow disease in U.S. cattle - neither of which made it into the food supply.
美国农业官员指出，美国只发生过两起记录在案的疯牛病病例，而且受到感染的牛肉并没有进入食品供应系统。
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