2. The voice of nature

3, tactfully.

4. It sounds good

5, orioles out of the valley

1, lingering sound: describe a sweet song or music that people can't forget at once.

2. Voice of nature: Compared with the earth and people, nature is the highest realm of music. Describe the voice is very beautiful.

3, euphemism: very nice, intoxicating.

4, nice: the voice is very nice, listening is very comfortable.

5. The oriole comes out of the valley: the beautiful voice of women.