其核酸结构为线状双股DNA, 衣壳为二十面体对称,有囊膜.It has linear double strand DNA, icosahedral - capsid and envelope.八面体和二十面体的三角化效果不错,而且也不难实现.Octahedral and icosahedral tessellations work well and are notvery difficult to implement.球状病毒衣壳采用二...
Frank Deford is a special correspondent for Newsweek magazine.弗兰克·德福特是《新闻周刊》杂志的特派记者。Our economics correspondent, James Morgan, is just back from Germany.我们的财经记者詹姆斯·摩根刚刚从德国回来。From Nairobi here's our East Africa corre...