I have learnt a new song.

我学了一首新歌。

His new song is a massive hit.

他的新歌成为一首热门金曲。

There's a new song about him.

有一首关于他的新歌。

In this class we learn a new song.

在这节课上我们学一首新歌。

That new song will catch on quickly.

那首新歌很快就会流行起来。