For example, tetracycline is common on mainland China's pig farms.

比如，中国大陆的养猪场普遍使用四环素。

He sells them to pig farms and fisheries.

他把它们卖给养猪场和渔业。

He runs a pig farm in Lincolnshire.

【farm】他在林肯郡经营一个养猪场。

The research suggests these genetic changes probably spread from a pig farm in China.

研究表明，这些基因变化可能是从中国的一个养猪场传播的。

This is where sausages and bacon are, you know, there's a lot of pig farms there.

这是香肠和熏肉的产地，你知道，那里有很多养猪场。