鸟儿唱歌不是因为它们有了答案，而是因为它们有歌要唱。

A bird does not sing because it has an answer. It sings because it has a song.

youdao

鸟儿唱歌不是因为它们有了答案，而是因为它们有歌要唱。

A bird does not sing because it has an answer. It sings because it has a song.

youdao