Spanish Silbo, a whistle language, has only four vowel and four consonant sounds. Audible for miles, it resembles bird calls.

西班牙的席尔波语是一种口哨语言，只有四个元音和四个辅音。几英里外都能听到它的声音，它就像鸟儿的鸣叫。

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Spanish Silbo, a whistle language, has only four vowel and four consonant sounds. Audible for miles, it resembles bird calls.

西班牙的席尔波语是一种口哨语言，只有四个元音和四个辅音。几英里外都能听到它的声音，它就像鸟儿的鸣叫。

youdao