Smiles, nods, and cheerful faces added to the general gaiety.微笑、点头和喜洋洋的脸庞使喜庆的气氛变得更浓了。Even Homer sometimes nods.[谚]智者千虑,必有一失.Jim expression nods dully, next dodder along ground went kitchen.吉姆神色呆滞地点了点头, 然后跌跌撞撞地去了厨房.Even H...
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...