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.溶酶体也为膜所包绕,含有分解某些大分子的酶.Lysosomes are also membrane bound and they contain the enzymes concerned with the breakdown of macromolecules.心脏被一种叫做心包的...
He's got a holograph by Shakespeare.他弄到了一封莎士比亚的亲笔信。Hologram ( Holograph ): A three - dimensional image created by lasers. There are different types of holograms.全息图: 用激光产生的 立体 影像. 全息图有多种.The frequency domain, the ho...