例句：
流行歌曲的源頭，可以追溯到三四十年代的黎錦暉、陳歌辛等人的創作，其思想藝術質量良莠不齊。
The wellsprings of popular songs can be traced back to composers of the 1930s and 1940s, such as Li Jinhui and Chen Gexin, the ideological quality of whose artistry was uneven.
註釋：源頭亦可用source，但是用wellsprings，裏面有春天的單詞，所以總體感覺有活力。