Balmer band

例句：

1. 1. The Balmer band is a region in the solar system.
   巴勒默带是太阳系的一个区域。
2. 2. The Balmer band is responsible for the emission of light from stars.
   巴勒默带负责恒星发光的发射。
3. 3. The Balmer band is a complex of spectral lines that are visible to the naked eye.
   巴勒默带是一组可见光谱线，肉眼就能看到。