另一种方法是使用固定量的有毒物质，能够给出同样的最终信息，但使用较小的动物并且不需要它们死亡，这个方法可以代替LD50。

A method using a fixed amount, which gives the same eventual information hut USES fever animals and does not require that they die, may replace the LD50.

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认为细胞固定化技术具有活性高，可反复利用和对有毒物质抵抗能力强等优点。

The conclusion is that the immobilized cell technology has the advantage of high activity, repeating using and high resisting toxicant's ability.

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