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.The prompt administration of diphtheria antitoxi...
The woman moaned faintly but made no intelligible response.那个女人发出微弱的呻吟声，却没有作出任何有意义的反应。"I'm a real intellectual-type guy, Tracy," James joked. "Oh, give me a break," Tracy moaned.“我可是个货真价实的高智商小伙儿，特雷西。”詹姆斯开玩笑地说道。“哦，别烦...
风力涡轮机个头大、噪音响，还会破坏周边风景。Wind turbines are large and noisy and they disfigure the landscape.涡轮机的损坏降低了工作的效率。Damage to the turbine slowed the work down.涡轮机内的蒸汽从管内导至叶片上.In a steam turbine, steam from pipes is directed onto the...