In this paper, a discrete stage - structured epidemical model is proposed and studied.本文主要讨论了离散的阶段结构传染病模型.OBJECTIVE To explore the administration measures of air condition usage in SARS epidemical period.目的研究传染性非典型肺炎流行期间...
Marie Curie's remains were exhumed and interred in the Pantheon.玛丽·居里的遗体被移出葬在先贤祠中.He was French, of good family, and his name was Pierre Curie.他叫皮埃尔-居里,是法国人, 出身良好.At last came the day when Marie Curie was almost at ...
His courage beggars description.他的胆量无法用语言来形容。To give money to beggars sometimes amounts to encouraging begging.给乞丐钱,有时就等于鼓励行乞.Let beggars match with beggars.龙配龙,凤配凤....