No toxic response has been found in acute toxicity test.

急性毒性实验未见任何毒性反应。

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Objective: Safety of the purified wood vinegar was studied by the acute and chronicity toxic response on the experiment animal.

目的：通过观察实验动物使用木醋液后的急、慢性毒性反应，评估精制木醋液的安全性。

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In response to the appearance of such variants in the cell population the concentration of the toxic chemical in the growth medium is increased, thus keeping the selection pressure constant.

为应对细胞污染中出现的变异，有毒物质的浓度是逐步增加的，以此保证筛选力度的稳定。

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So,Once they are lost in response to a toxic sound or to an antibiotic it cannot be regenerated by natural means.

一旦因噪音或抗生素遭受损失,就难以再生。

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