英语语法分析

This very safe agent has taken over from hexachlorophene, which had a tendency to neurotoxicity.

这种安全成分来自于双三氯酚，后者有神经毒性倾向。

Hexachlorophene -containing skin cleanser is substituted when allergy to shellfish or iodine is present or suspected.

在怀疑或患者确实存在对碘及贝类动物过敏时，可以改用含有六氯酚的皮肤消毒液。