After the 1960 s, China began to inoculate BCG, pertussis, diphtheria, tetanus, measles and poliomyelitis vaccines.六十年代后, 中国开始在大、中城市接种卡介苗 、 百日咳 、 白喉 、 破伤风 、 麻疹、脊髓灰质炎的疫苗的工作.Recent studies suggested that erythromycin may b...
Recent studies suggested that erythromycin may be effective in prophylaxis against pertussis in exposed, susceptible persons.最近的研究提示,红霉素对暴露于百日咳的易感者,在预防上有效.Whooping cough is a serious respiratory disease caused by Bordete...
The little witch put a mock malignity into her beautiful eyes, and Joseph, trembling with sincere horror, hurried out praying and ejaculating " wicked " as he went.这个小女巫那双美丽的眼睛里添上一种嘲弄的恶毒神气. 约瑟夫真的吓得直抖, 赶紧跑出去,一边跑一边祷告,还嚷着 “...