They hypothesize that language diversity must be about history, cultural differences, mountains or oceans dividing populations.
他们假设，语言多样性一定与历史、文化差异、山脉或海洋分隔人口有关。
Even within the tropics, language diversity varies widely.
即使在热带地区，语言的多样性也有很大的差异。
We are frequently confronted with statements about the alarming rate of loss of language diversity.
我们经常听到关于语言多元性快速丧失的言论。
We are frequently confronted with statements about the alarming rate of loss of language diversity.
我们经常听到关于语言多元性快速丧失的言论。
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