Samples of hog urine and tissue were collected over time.

样品的猪尿和组织收集随着时间的推移。

N-COUNT. 猪（英国英语中常指阉公猪，而美国英语中泛指猪）. A hog is a pig. In British English, hog usually refers to a large male pig that has been castrated, but in American English it can refer to any kind of pig.
※Feed a pig and you'll have a hog. 种瓜得瓜，种豆得豆。
※To travel through the world it is necessary to have the mouth of hog, the legs of a stag, the eyes of a falcon, the ears of an ass, shoulders of a camel, and the face of an ape, and overplus, a satchel full of money and patience. 周游世界须有猪嘴巴，鹿的腿，鹰的双

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