make a vaccine against
制造一种疫苗
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Researchers are trying to make a vaccine against malaria but are having difficulty. Understanding how it became adapted to humans could help in this work.
研究人员正试图研究出对抗疟疾的疫苗，但停滞不前。理解这种里氏疟原虫如何感染人类能对疫苗的研发有所帮助。
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