某些病毒的核衣壳是由被膜所包绕.In some viruses the nucleocapsid is surrounded by an envelope.衣壳同包围它的核酸一起称为核衣壳.The capsid together with the enclosed nucleic acid is the nucleocapsid.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 stra...
For the time being, however, immunotherapy is still in its experimental stages.但免疫疗法目前仍处于实验阶段。Treatment, though - whether it's chemotherapy or immunotherapy - will tilt the odds in her favour.不过,治疗一下 -- 不管是化学疗法还是免疫疗...