两种方法比较，我们认为，直接接触细胞培养法对于生物材料毒性评估而言，方法简单、结果直观、效率更高。
As we thought it is better to direct contact ceil culture will be simplify, directly and more effectiveness for bio-materials evaluation.
本文从实验动物垫料原材料毒性、抽提物毒性、以及垫料对实验动物生长繁殖的影响几个方面进行了综述分析。
This paper overview the toxicity of the bedding materials, extraction, and the bedding influences on laboratory animal growth and breeding.
工业废料更有害，因为其中有许多毒性很强的材料，如铜和铅。
Industrial waste is even more harmful since there are many highly poisonous materials in it, such as copper and lead.
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