You might choose to use a word for "Dog" as "Woof woof" because it sounds like a dog but you can't use a word for "Country" that sounds like a country.

你可以用"汪汪"这个词来表示"狗",因为它听起来像只狗,但你却无法使用一个听起来像国家的词,来表示"国家"

耶鲁公开课 - 心理学导论课程节选

Microsoft Bob was kind of like a low end Word processor and spreadsheet but the screen look like a house and this dog walked around and talked to you about writing your book reports or something.

那是一款类似于,低端文档处理器和数据表,的产品，但是屏幕,看起来像个房子,还有狗走来走去和你对话，写书或者报告。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

For a language like English, that creature there is referred to with the morpheme "Dog."

对于像英语这样的语言,那种生物被表示为语素"狗"

耶鲁公开课 - 心理学导论课程节选