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