Inside eukaryotic cells, you have a nucleus.

真核细胞中有一个细胞核。

Around 1.25 billion years ago, a eukaryotic cell cannibalized another cell.

大约 12.5 亿年前，一个真核细胞蚕食了另一个细胞。

Most cells are eukaryotic — animal cells, plant cells, and fungi, etc.

大多数细胞是真核生物——动物细胞、植物细胞和真菌等。

But the system has been altered for use in a variety of species and eukaryotic cells.

但该系统已被改造，可在许多物种和真核细胞中使用。

Life finally had all the ingredients that it needed to get interesting: It had eukaryotic cells, which would become the building blocks of complex organisms.

生命终于拥有了变得有趣所需的所有成分：它有真核细胞，这将成为复杂生物体的基石。

" Diameter of a eukaryotic cell." Look at that, Soren.

" 真核细胞的直径" , 看看这个, 索伦。

We're back to our—to our big, big eukaryotic cell.

我们回到了我们的大真核细胞。

So the biggest eukaryotic cell is our happy place in the middle.

所以最大的真核细胞是我们在中间的快乐地方。

When compared to eukaryotic cells, the structure of bacteria is less complex due to a lack of nucleus and membrane-bound organelles such as mitochondria, endoplasmic reticulum, and Golgi complexes.

与真核细胞相比，细菌的结构简单很多：缺少细胞核及膜包被的细胞器，例如线粒体、内质网与高尔基体。

At 1pm, a simple cell engulfs another, creating a symbiotic relationship and the first eukaryotic cells, or cells with internal organs.

下午 1 点， 一个简单的细胞吞噬另一个细胞，形成共生关系， 并产生第一个真核细胞或具有内脏器官的细胞。

Sometimes these problems could be overcome by making fusion proteins which were later cleaved to give the desired protein, but the subsequent availability of eukaryotic cells for production (yeast or mammalian cell lines) has helped greatly.

转基因动物。