For many years the leading fixatives were the animal products ambergris, civet , musk and castoreum.

多年来，用较多固定物制品龙涎香、香猫香、麝香、以及河狸香。

Methods The eyeballs of rat were fixed in the improved fixative solution mixed with paraform,glacial acetic acid and acetone.

方法将鼠眼球投入到由多聚甲醛、冰醋酸和丙酮组成固定液中固定后制成石蜡切片,经HE染色后在显微镜下观察。