提出每种方法的利弊，介绍在试管内替换测验象细胞方法那样适合厉害的系统的毒性，目标器官和地方的毒性。
Presenting the advantages and disadvantages of each method, it introduces in vitro alternative testing such as cellular methods for acute systemic toxicity, target organ, and local toxicity.
两次练习测验中,都有一道题是关于变量替换的,感觉这是很重要的那样。
There is one change of variable problem on each of the two practice exams to give you a feeling for what's realistic.
两次练习测验中,都有一道题是关于变量替换的,感觉这是很重要的那样。
There is one change of variable problem on each of the two practice exams to give you a feeling for what's realistic.
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