可以译作:恰当的语言
如:...the fact that such noises are similar on the lips of frenchmen whose languages are utterly different,serves to emphasize on the fundemental difference between these noises and language proper ......对于那些语言完全不同的法国人来说,他们舌头发出来的这些音节是类似的,这样的一个事实对于恰当的语言和发音的根本不同起到了强调作用
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