Twilight

Civil, nautical, and astronomical twilight. The Sun is shown to scale.[2]

Evening civil twilight on Lake Ontario, Canada

Twilight is the illumination of the Earth's lower atmosphere when the Sun itself is not directly visible because it is below the horizon. Twilight is produced by sunlight scattering in the upper atmosphere, illuminating the lower atmosphere so that the surface of the Earth is neither completely lit nor completely dark. The word "twilight" is also used to denote the periods of time when this illumination occurs.

单词	BMNT
释义	BMNT 英语百科 Twilight Twilight is the illumination of the Earth's lower atmosphere when the Sun itself is not directly visible because it is below the horizon. Twilight is produced by sunlight scattering in the upper atmosphere, illuminating the lower atmosphere so that the surface of the Earth is neither completely lit nor completely dark. The word "twilight" is also used to denote the periods of time when this illumination occurs.
随便看	peritrematal shield peritreme peritreme plate Peritrich peritricha peritrichal peritrichal cilium peritrichan peritrichate Peritrichia peritrichial peritrichiate peritrichic Peritrichida peritrichous peritrichously peritrichs peritroch peritrochanteric peritrochanteric fracture peritrochia peritrochoid peritron peritrophic Peritrophic membrane

BMNT

Twilight