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1·Uruguay has a microchipping system for cattle, which costs $20 a head.

乌拉圭关于养牛有着通过微型芯片跟踪的系统，其花费为每头牛20美元。

2·Uruguay, for example, has a system of microchipping calves that costs about $20 a head.

比如说，乌拉圭关于养牛有着通过微型芯片跟踪的系统，其花费为每头牛20美元。