安静

quiet; calm; peaceful; tranquil; silent; still; undisturbed; serene; noiseless; hushed; restful; quietly; silently; peacefully; calmly; piano; quiet down; quieten down; hush down; settle down; pipe down; lull; tranquilize; quietness; tranquility; silence; peace; stillness; serenity; quietude; hush; in silence; [music]p. (short for piano, used as an instruction for telling you to play or sing quietly)

舒缓

gentle; gradual; mild; relaxed; soothing; unhurried; ambient; soothe; diffuse; relax; ease; alleviate; slacken; slow down

歌曲

song; track; melody