For decades educators fought his idea that signed languages are natural languages like English, French, and Japanese.

美国国家航空航天局技术人员在最后的检查中注意到了计算机问题。

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Human languages are known as natural languages.

人类的语言一般称为自然语言。

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Natural languages are beyond their scope, but most computer programming languages are within their bounds.

自然语言超出了它们的范围，但是大部分计算机编程语言在它们的范围之内。

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David Harrison and Gregory Anderson of Living Tongues say that many endangered languages are spoken by native cultures in close contact with the natural world.

VOA: special.2009.12.02

Where there are many languages in use, language comes to seem arbitrary rather than natural, ; as the product of convention; not as something you're simply born into but something that you learn, something that is made and that can be remade.

世界上有很多种语言在使用中，然而语言的运用却显得任意，而非自然而然的作为传统的产物;,不像是与生俱来的才能，而像后天学会的，像是某些创造再创造的事物。

耶鲁公开课 - 现代诗歌课程节选

Of course, natural languages use different sounds and marks to express the same concepts.

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Since at least the Middle Ages, philosophers and philologists have dreamed of curing natural languages of their flaws by constructing entirely new idioms according to orderly, logical principles.

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The job descriptions are chunks of text in natural languages.

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