"a bird will not learn its song unless it hears it at an early age"
a device for imitating a birdcall
例句
She would play a birdcall and see which one of us could identify it first. 她先播放鸟儿的叫声，然后看我们两人谁先将这种叫声辨别出来。
Now, small De Hua already became Dadehua, there also is the girlfriend of an intimate in the United States, birdcall fawn on. 今朝，小德华已成为大德华了，在美国也有一位知心的女朋友，叫子媚.
Aesthesia sets in every morning with birdcall and I follow my senses and the ritual of trying to use the least amount of time to deal with trivial but essential routines; 每天清晨被鸟叫醒，凭着直觉用最短的时间处理掉吃喝拉撒之类生活必须的琐事；
