No one knows for sure why a domestic cat purrs, but many people interpret the sound as one of contentment.

没有人知道为什么一个家猫发出咕噜咕噜的声音，但许多人解释声音作为一种满足感。

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No one knows for sure why a domestic cat purrs, but many people interpret the sound as one of contentment.

没有人知道为什么一个家猫发出咕噜咕噜的声音，但许多人解释声音作为一种满足感。

youdao