莱恩和马丁总结而这很可能解释为什么复杂的生命——真核生物——在地球的历史上仅进化了一次。
And that, Lane and Martin conclude, may well explain why complex life — eukaryotes — only evolved once in all of Earth's history.
我们仍然需要解释的是更特化的真核生物的磷酸化途径是怎么进化而来并取代了细菌的系统。
What still needs to be explained is how the more typical eukaryotic phosphorylation cascades evolved and came to replace the bacterial systems.
争论的结果不仅仅影响我们对早期真核生物进化的理解，还影响我们对贾第虫属生物学的观点。
The outcome of this debate affects not only our understanding of early eukaryotic evolution, but also our view of Giardia biology.
纤毛虫是单细胞的原生动物，在进化上属于低等的真核生物，但其各细胞器之间囊泡运输系统极为完善。
Ciliate, a unicellular protozoa and low eukaryotes in evolution, has perfect vesicular trafficking system among organelles.
这些划分的细胞被称为“真核生物”，它们源于一个共同的祖先，在四十亿年的进化出现只有一次。
These compartmentalized cells are called 'eukaryotic', and they all share a common ancestor that arose just once in four billion years of evolution.
对兰伯贾第虫的进化一定程度的关注在于它不能和其他生物相对应，因为它和经典教科书式的真核生物在许多方面不同。
The evolution of Giardia has commanded a level of attention matched by few other organisms because it differs from the "textbook" eukaryote in many ways.
核仁是真核细胞最显著的标志之一，但关于其进化上的起源迄今仍所知甚少，已发现有迹像表明原始性真核生物贾第虫没有核仁。
Nucleolar structure is one of the most obvious symbols. However, little is known about its evolutionary origin. Some previous studies implied that Giardia has no nucleolus.
核仁是真核细胞最显著的标志之一，但关于其进化上的起源迄今仍所知甚少，已发现有迹像表明原始性真核生物贾第虫没有核仁。
Nucleolar structure is one of the most obvious symbols. However, little is known about its evolutionary origin. Some previous studies implied that Giardia has no nucleolus.
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