It has linear double strand DNA, icosahedral - capsid and envelope.其核酸结构为线状双股DNA, 衣壳为二十面体对称,有囊膜.Octahedral and icosahedral tessellations work well and are notvery difficult to implement.八面体和二十面体的三角化效果不错,而且也不难实现.The capsi...
The government can't rest on its laurels and must press ahead with major policy changes.政府不能故步自封，必须继续大刀阔斧地推行政策改革。Every time the political complexion of the government changed, so did the defence policy...每当政府的政治性质发生...
Whales, seals, penguins, and turtles have flippers.鲸 、 海豹, 企鹅和海龟均有鳍形肢.Seals, turtles and penguins have flippers.海豹 、 海龟、企鹅均有鳍状肢.The diver put on flippers and was ready to dive.潜水员穿上脚蹼准备下水....
a cranky old truck一辆有毛病的旧卡车...a bunch of stupid, cranky, uncooperative old fools.一群老朽愚昧、乖戾不合作的蠢货a cranky person脾气坏的人Vegetarianism has shed its cranky image.素食主义者已经摆脱了其古怪的形象。Vegetarianism has shed its cranky image...素食主义者...