They discovered also that every cycle, the dark band Milky Way's center called Galactic Equator intersects with Elliptical, the plane movement of the sun across the sky. 他们还发现,在每个周期中,称为“银道”的“银河”中心均会与椭圆星系相交,即太阳穿过天空进行的平面运动。
A dark band in the spectrum of white light that has been transmitted through a substance that exhibits absorption at selective wavelengths. 白光通过某种物质时,某些波长的光被有选择性地吸收而在光谱上留下的暗带(DB)。
Juvenile : Tail greyish-buff, finely barred grey; indistinct dark band along trailing edge of wing. 幼鸟:尾羽灰黄色,有细微灰色条纹;翼外缘有宽的黑色镶边不明显。
Semidouble dark lavender star / purple band, white wavy edge. 半重瓣星状花,深紫色镶暗紫色边,再滚波浪白色边。
The results indicate that HCHO has a strong influence on the anodic behavior of both p-Si and n-Si electrodes in alkaline solutions. A reduction current of HCHO on an n-Si ( 100 ) electrode was observed in the dark due to the conduction band electron. 实验结果表明,甲醛不仅影响p和n型半导体电极在碱性溶液中的阳极氧化峰电流,而且在负电位区能在Si(100)电极上发生还原。