We'll actually see it's a wonderful way of effectively looping yourself back around, for instance if you're at the end of the alphabet So what about those variables?

如果我们要将某些东西首尾连在一起,在这个圈里循环，你就会看到它的奇妙之处了，譬如,你在字母表末,好，我么继续，这些变量都是些什么？

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All of it has a very, very cohesive end-to-end story.

它的一切都是一个完整的，首尾相连的故事。

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It's a double stranded circular piece of DNA, meaning that the 3', 5'ends that hang off are joined back together again to form a continuous loop.

它是双链环状DNA,它的3'末端和5'末端首尾相连,构成一种连续环状结构

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