音标:[pi'nʌmbrә] ;
n. 半影, 明暗交界部分, 边缘部分, 周围的气氛
[化] 半影
n. a fringe region of partial shadow around an umbra
词型变化:名词复数形式 : penumbras
考试类型:[GRE]
词性分布:
名词100%

penumbra的用法和样例:

例句

用作名词(n.)
  1. Vaapad is a path that leads through the penumbra of the dark side.瓦帕德就是一条游走于明暗面之间的道路。

词汇搭配

  • penumbra cone半影锥
  • penumbra zone半影区

经典引文

  • Round the lightswitch, a dark penumbra caused by the many hands..rubbed against the wall.

    出自:E. Figes
  • The vast penumbra of semi-dependent artisans and outworkers.

    出自:E. J. Hobsbawm
  • Almost all chronic illness is surrounded by a penumbra of gloomy imaginings.

    出自:P. Medawar
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