电子邮件的使用分布非常广泛，目前不可能将其统一为任何一种结构。
The use of e-mail is very widespread, and it is currently impossible to unify it into any kind of structure.
但是电子邮件的使用分布非常广泛，目前不可能统一为任何一种结构。
But email is too widely distributed to corral into a any kind of structure now.
上图是一只南非鼠耳蝠，是一种在相对普遍的热带稀树草原物种，广泛分布于非洲。
This is Myotis tricolor, a relatively common savanna species that is widespread across Africa.
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