因为一般的测定动物食物的测试只测量其中氮的含量，这些化学物质可以被加入昂贵的食物成分中而不为人所知。
Since the usual test for protein in animal feed just measures the level of nitrogen, these chemicals can be added to far more expensive feed ingredients without anybody noticing.
而他的确有一个疑问，这个疑问也许对解释以下问题有所裨益，那就是除去对物种的偏见之外，还有什么原因使得人们之前未展开适当的研究来测定爬行动物的智商。
He does, however, have a problem-and it is one that might help to explain why, besides phylogenetic prejudice, the lizard mind has not been properly investigated before.
该科学小组希望此项发现能引起社会对印度两栖动物的重视，关注他们在测定环境健康方面的作用。
It's a find the team hopes will bring attention to India's amphibians and their role in gauging the health of the environment.
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