This has occurred throughout human history, but the rate of language disappearance has accelerated dramatically in recent years.
这一现象的发生贯穿了人类历史，但是近年来语言流失的速度正在显著加快。
The rate of language hypoevolutism was 42.55%, that was the highest in all types of speech disability.
言语残疾类型中，语言发育迟缓所占比例最高，达42.55％；
The rate of language hypoevolutism was 42.55%, that was the highest in all types of speech disability.
言语残疾类型中，语言发育迟缓所占比例最高，达42.55％；
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