與葡萄牙語一樣，我每天要完成四個簡短的任務與測驗；但這次我需要將 12 個完全聽不懂的聲音，配對到 12 個從未見過的物體圖片上。後來我才得知，這些物體與詞彙都不是真實存在的。我口中念出的其實是中文的聲調，而聲調是中文的重要特徵：不同聲調會改變一個詞的意思。
Author(s): Fangwei Yang, Haoran Sun, Xiaoxin Yang, Xu Li, Gang Yang
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Not every modern human has the same set of Neanderthal DNA, however; different people will, by chance, have inherited different fragments. But there are also some areas, termed "Neanderthal deserts," where none of the Neanderthal DNA seems to have persisted. Notably, the largest Neanderthal desert is the entire X chromosome, raising questions about whether this reflects the evolutionary fitness of genes there or mating preferences.