crescendo murmur

例句：

1. 2.
   音乐
2. 3.
   声音
3. 1. The performer was heard to murmur "I love you" during the crescendo.
   表演者在渐强时低声说“我爱你”。
4. 2. The audience could hear the performer's crescendo murmur.
   观众能听到表演者的渐强声。
5. 3. The singer's voice was soft and low, with a gentle crescendo murmur.
   歌手的声音柔和而低沉，带有轻微的渐强声。