The campaign is also involved in efforts to vaccinate African children against measles and polio.
这项活动也专注于为非洲的儿童预防接种来抵抗麻疹和小儿麻痹症.
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瓦勒斯是为根除小儿?痹等疾病筹募美金100万元,在六个月内走了2, 658 哩,业已完成一半.
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The first authoritative study of polio was published in 1840...
关于小儿麻痹症的第一篇权威性研究报告发表于1840年。
《柯林斯高阶英汉双解学习词典》
