生物专业英语第六章生命的起源.ppt

17. liposome n. 脂质体 [ lip?s??m,lai- ] A vesicle formed by the homogenization (emulsification) of phospholipids in dilute salt solutions. Liposomes are the prototypes of membrane-bound biologic structures. phospholipid：[f?sf?‘lipid] 磷脂 生物学定义：当两性分子如磷脂和鞘脂分散于水相时，分子的疏水尾部倾向于聚集在一起，避开水相，而亲水头部暴露在水相，形成具有双分子层结构的的封闭囊泡，称为脂质体。 18. ozone layer n. 臭氧层 [ ?uz?un, ?uz- ] A layer of the atmosphere, about 20 to 50 km above the surface, which contains ozone produced by ultraviolet radiation.  19. proteinoid n. 类蛋白 [ pr?utin?id ] A proteinlike structure of branched amino acid chains that is the basic structure of a microsphere. 指氨基酸在干燥状态下加热聚合而成的类似蛋白质的聚合物。 20. taxon n. 分类单位，分类群 [ t?ks?n ] 21. taxonomy n. 分类学 [ t?ks?n?mi ] Words and Phrases: Big Bang n. 大爆炸 2. Binomial system of nomenclaturen. 双名法 3. clade n. 进化枝，分化单位 4. class n. 纲 5. coacervate n. 团聚体，凝聚层 6. continental drift n. 大陆漂移 7. Core n. 核心 8. crust n. 地壳 9. Division n. 门 10. Family n. 科 11. Genus n. 属 12. Kingdom n. 界 Words and Phrases: 13. Liposome n. 脂质体 14. Mantle n. 地幔，外套部 15. Order n. 目 16. ozone layer n. 臭氧层 17. Phylum n. 门 18. Proteinoid n. 类蛋白 19. Species n. 物种，种 20. Taxon n. 分类单位，分类群 21. Taxonomy n. 分类学 Text Analysis 1.A Home for Life: Formation of the Solar System and Planet Earth The story of lifes origins begins with the formation of the earth. The sequence of events that gave rise to our planet began, in turn, with the cosmic explosion physicists call the Big Bang. 生命起源于地球的形成。相对应地，我们行星的形成源于一连串的事件，其始作俑者便是宇宙爆炸论物理学家所说的大爆炸。 The sun at the center of our solar system condensed from a cloud of primordial matter roughly 5 billion years ago; the planets, including the earth, condensed about 4.6 billion years ago. 太阳位于太阳系的中心，在约50亿年前由一团原始物质生成；各大行星，包括地球，在约46亿年前生成。 primordial [英] [pra??m?:di?l] 原始的，初生的 The earth is composed of a number of layers: a solid crust, a semisolid mantle, and a largely molten (liquid) core that has a solid center. Basic physical features of Earth that may have made the eme