The names all look - they're all italicized

名字看起来都很-- 都是斜体的
and they're capital letters and small letters so that they won't be easy for you to understand,

大写小写字母混合你们不太容易理解
but they are - if you know the nomenclature,

但它们都是--如果你懂命名法
easy to understand.

是很容易理解的
This restriction enzyme was found in a natural source,

这个限制性内切酶源于自然界
it was found in a micro-organism called E.coli.

是从名为大肠杆菌的微生物中发现的
The first three letters of E. Coli are Eco,

大肠杆菌的前三个字母是Eco
so Eco.

也就是酶名字中的Eco
It was found in strain R,

酶被发现于R菌株
a particular strain of E.coli,

大肠杆菌中一种特别的菌株
and it was the first one found,

又是被发现的第一种内切酶
so EcoRⅠ .

所以叫EcoRⅠ