Thus far, the researchers have tested the technique only on pieces of pig intestine that they obtained from a slaughterhouse.

到目前为止，研究人员只在他们从屠宰场获得的猪肠道片段上测试了这项技术。

They are simply pigs' intestines stuffed into a casing, then boiled or grilled.

它们只是将猪肠塞入肠衣，然后煮或烤。