音素

例句：

1. 1. The phone rang, and I heard the sound of rain outside.
   电话响了，我听到外面雨的声音。
2. 2. She sings beautifully, and her voice is filled with emotion.
   她唱得非常好，她的声音充满了感情。
3. 3. Music is composed of many different sounds, each having its own unique pitch.
   音乐由许多不同的音组成，每个音都有自己的独特音高。