1. The undersong of the music added a haunting quality to the performance.
音乐的低音部分给表演增添了一种令人难以忘怀的质感。
2. The novel is filled with undersongs of sorrow, reflecting the protagonist's inner struggles.
这部小说中充满了悲伤的隐喻,反映了主角的内心挣扎。
3. The dolphins communicate through an undersong that is undetectable to human ears.
海豚通过一种对人类耳朵无法察觉的声音进行交流。