cowpox造句
The discovery of the
cowpox vaccination let the danger of vaccination more less, and cost lest.
牛痘术的发明使种痘的危险性更小, 花费也降到最低,故而很快在全世界推广开来.
In nineteen century, Enligh doctor Pearson came to Macao to spread the
cowpox vaccination.
到19世纪时, 英国医师皮尔逊到澳门推广牛痘术.