正当他要放弃的时候，他看到一个穷人在街上快乐地唱歌。
Just as he was about to give up, he saw a poor man singing happily on the street.
在春天，到处都是鲜花。鸟儿从南方回来，整天快乐地唱歌。生活一切都回来了。
In spring, there are flowers everywhere. The birds come back from the south and sing happily all day. Every-thing comes back to life again.
他快乐地为任何要他唱歌的人歌唱。
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