achromatic interval

例句：

1. 1.The scientist observed the achromatic interval between the two stars.
   科学家观察了两颗星星之间的无色间隔。
2. 2. The artist used achromatic intervals to create a sense of depth in her painting.
   艺术家使用无色间隔在绘画中创造出深度感。
3. 3. The engineer calculated the achromatic interval for the new bridge design.
   工程师计算了新桥梁设计的无色间隔。