The scientists first played the birds two recorded sounds that they likely had never heard before. One was a warning cry of an allopatric chestnut-rumped thornbill, a bird not native to Australia. The other was a computer-generated bird sound called " buzz" .
科学家首先向鸟儿播放了们以前从未听过
音。一
音是异域
刺嘴莺
警告声,这
鸟不是澳大利亚本土
。另一
音是电脑生成
" 嗡嗡" 鸟叫声。