Training a bird that has "been crushed" to recover its voice is an arduous task, but the curious thing is that a bird that can be so trained will often sing louder and better than before.
叫敗的鳥可是個麻煩，得經過相當時間，加上主人耐心的引導，才可能恢復鳴唱。但妙的是，恢復了鳴叫的畫眉，通常比以前叫得更好，好像已免了疫，膽子也大了。