目前已知一共有18个种类，主要的区别在于头的颜色和体型的大小。

There are 18 species of penguins. Themain differences between are the color of head and their size.

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目前已知一共有18个种类，主要的区别在于头的颜色和体型的大小。

There are 18 species of penguins. The main differences between are the color of head and their size.

youdao

对于信息资源概念的认识可分为宽泛型、狭窄型、折中型和信息本体型四种类型，其中信息本体型更可取。

For information resources, there are wide, narrow, eclectic and information-based concepts. Among them, the information-based concept is more acceptable.

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