Bacterial cells are small, one to two microns in diameter and this shows a picture of a common bacterium called E. Coli.

细菌细胞很小,直径只有一到两个微米,这张图片是一种常见细菌,大肠杆菌

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This restriction enzyme was found in a natural source, it was found in a micro-organism called E.coli.

这个限制性内切酶源于自然界,是从名为大肠杆菌的微生物中发现的

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And what he could show was that it could be expressed, this is a picture from his 1994 science paper, in that e coli, and it is going to fluoresce green.

他证明了它可以被表达，这是1994年science文章里的一张图，在这大肠杆菌里，它有绿色的萤光。

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It was found in strain R, a particular strain of E.coli, and it was the first one found, There's a nomenclature that's evolved for this.

酶被发现于R菌株,大肠杆菌中一种特别的菌株,又是被发现的第一种内切酶,有一种专门为此制定的命名法

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The first three letters of E. Coli are Eco, so Eco.

大肠杆菌的前三个字母是Eco,也就是酶名字中的Eco

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