chaffinch的复数形式怎么写

Thorpe next set out to determine exactly when the chaffinch learns to sing.接着,索普就开始研究苍头燕雀是在什么时候学唱歌的.The chaffinch has three or four songs and produces them in a specific order.苍头燕雀合唱三、四种歌,唱的时候按着一定的先后次序....

chaffinch的音标：chaffinch的英式发音音标为：['tʃæfɪntʃ]chaffinch的美式发音音标为：['tʃæfɪntʃ]...

n.花鸡（一种欧洲鸣禽）...