At least six hundred languages have been developed in the search for a language which all human beings would be able to speak.
正确答案:
在寻找一门所有人类都能说的语言的过程中发现至少产生了600种语言。
答案解析:有
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At least six hundred languages have been developed in the search for a language which all human beings would be able to speak.
在寻找一门所有人类都能说的语言的过程中发现至少产生了600种语言。
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