Another problem is the lack of good animal models.

另一个难题是缺少良好的动物模型。

youdao

Confined animal feeding operations involve heavy use of antibiotics, and this contributes to the problem of antimicrobial resistance, as you will be discussing during this session.

密闭式动物喂养涉及大量使用抗生素，而这促成了抗菌素耐药性的问题。你们在这次会议期间将讨论这一点。

youdao

This is because social animals must engage in problem solving every time they interact with another animal in the group.

这是因为群居动物在解决问题的时候必须与这个群族里的动物进行互动。

youdao

Underlying many of our mistaken beliefs about animal intelligence is the problem of negative evidence.

WSJ: The Brains of the Animal Kingdom

So far, says Chief Scientific Officer David Stirling , Revimid does not cause such birth defects in New Zealand rabbits--the only animal model in which the Thalomid problem shows up.

FORBES: Magazine Article

The British Government was sufficiently concerned about the problem to ban the use of human antibiotics as animal growth promoters.

BBC: Animals and antibiotics: the risks