• That's a lot easier to do with lab animals than with children.

    动物身上试验孩子身上做实验要容易得

    youdao

  • Formaldehyde is a carcinogen that has been shown to cause cancer in lab animals.

    甲醛种在实验室动物身上证明导致癌症致癌物质。

    youdao

  • Formaldehyde is a carcinogen that has been shown to cause cancer in lab animals.

    甲醛种在实验室动物身上证明导致癌症致癌物质。

    youdao

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