常見(jiàn)例句用作名詞 (n.)He found that people who had had cowpox seemed to be safe from catching smallpox.他發(fā)現(xiàn)凡患過(guò)牛痘的人似乎對(duì)于天花具有免疫力。Jenner's experiment with cowpox opens up a new horizon in disease prevention.珍納醫(yī)師的神奇牛痘實(shí)驗(yàn)展開(kāi)了疾病預(yù)防的新頁(yè)。 返回 cowpox