even tone

例句：

1. 1. The music has an even tone that is soothing to the ears.
   这首音乐有一种平和的调子，让人耳朵感到舒适。
2. 2. The teacher used even tone in her speech to emphasize the important points.
   老师在演讲中使用了平和的语气来强调重点。
3. 3. Even tone can be used to create a sense of balance and harmony in a composition.
   偶数调可以用来在作品中创造平衡和和谐的感觉。