Thorpe also showed that the chaffinch is selective imitate .
索普还证明,苍头燕雀学歌是有所选择的.
We have been surrounded by birds all our lives , yet so feeble is our observation that many of us could not tell whether or not the chaffinch sings , or the colour of the cuckoo .
我们的生活被各种鸟包围着，然而我们缺少的是观察，我们中的许多人多不知道花鸡的叫声，布谷鸟的颜色。
Because I shared his fascination with the chaffinch song , he had invited me to join his research group .
因为我和他一样对苍头燕雀的歌声着了迷，他就邀请我加入他的研究小组。
Thorpe also showed that the chaffinch is selective in what it will imitate .
索普还证明，苍头燕雀学歌是有所选择的。
Thorpe next set out to determine exactly when the chaffinch learns to sing .
