If you want a small pet that you can actually pet, a guinea pig is a good choice.

如果你只是想要一只小宠物，豚鼠是一个很好的选择。

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Dr. Roger Altounyan used himself as a human guinea pig.

罗杰• 奥托扬医生拿自己作为实验对象。

《柯林斯英汉双解大词典》

Scientific experiments have demonstrated incredible ways to kill a guinea pig, a small furry animal.

科学实验展示了难以置信的杀死豚鼠的方法，这是一种毛茸茸的小动物。

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Citigroup denies the allegations and claims that it is a guinea pig in a test case.

ECONOMIST: Citigroup and its regulators

Six Yale students needed a guinea pig for a class project.

FORBES: Yale Student Allows His Privacy To Be Obliterated For A Class Project

It works by heating the moisture in a person's skin to the point where it feels, according to Kelley Hughes, an official at the directorate who volunteered to act as a guinea pig, like opening a hot oven.

ECONOMIST: Electromagnetic weapons