While, like bacteria, archaeans don't have a cell nucleus, they share other traits with eukaryotes like you and me.
2
古生菌还具有完全与细菌和真核生物不同的细胞膜。
Archaeans have cell membranes that are completely different from both bacteria and eukaryotes.
3
问题是，虽然胞内同生在真核生物中非常常见，这往往造成吞噬其他细胞，但是在较为硬质的细菌难以察觉。
The trouble is that, while cells within cells are common in eukaryotes, which often engulf other cells, they're vanishingly rare in more rigid bacteria.
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