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.
近义、反义、联想词
近义词
n.
hour, time of day, light, visible light, visible radiation, decline, declination
adj.
dark
反义词
n.
light
解析
twilight 指日落后或日出前的微明,但通常侧重于前者。 dawn 指天刚亮时的黎明,可作引申用。 dusk 指接近夜晚的黄昏时刻。