The meows that were rated most pleasant were shorter in duration, had higher frequencies and tended to change from high to low notes.

而那些被评价为最急迫的叫声在时间上持续得较长，频率较低，经常是从低音开始，逐步上升到 高音。

youdao

The meows that were rated most pleasant were shorter in duration, had higher frequencies and tended to change from high to low notes.

而那些被评价为最急迫的叫声在时间上持续得较长，频率较低，经常是从低音开始，逐步上升到 高音。

youdao