这是对她最尖锐的批评。This was the most biting criticism made against her.他因这番尖锐的批评而万念俱灰，茫然不知所措。He was shattered and bewildered by this trenchant criticism.他一直在问一些尖锐的问题。He never stopped asking penetrating questions....
他们脚下的石板路经过数百年的踩踏，磨得光溜溜的。The flagstones beneath their feet were worn smooth by centuries of use.她坐在铺着石板的庭院里的一把椅子上。She sat on a chair in the flagged yard.后门旁一块石板地a paved area near the back door...
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.Anti-malarial vaccines are now under-going trial...