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1. The study found that the presence of this toxoid alum precipitate could be a significant risk factor for developing diphtheria.
研究发现，这种毒素铝沉淀的存在可能是患上白喉的一个重大风险因素。
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2. In recent years, there has been an increasing interest in developing vaccines that contain this specific toxoid alumprecipitate.
近年来，人们越来越感兴趣于开发含有这种特定毒素铝沉淀物的疫苗。
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3. The research team conducted experiments to determine if the presence of this toxoid alum precipitate could affect the immune response to the vaccine.
研究小组进行了实验，以确定这种毒素铝沉淀物的存在是否会影响对疫苗的免疫反应。