umbra

IPA/ˈʌmbrə/
KK[ˈʌmbrə]IPA/ˈʌmbrə/

umbra — 名詞

  • umbrasingular
  • umbrasplural

1. the central zone of total darkness inside a shadow, formed when a light source i

1.名詞C2
釋義

本影

日食或月食時，陰影中最暗的核心區域

the central zone of total darkness inside a shadow, formed when a light source is completely hidden — a word used in astronomy for the blackest area of the shadow during a solar or lunar eclipse

例句

During the total solar eclipse, people inside the umbra saw the sky turn pitch black.

在日全食期間，位於本影內的人看到天空變得一片漆黑。

inside the umbra — prepositional collocation

The science teacher drew the moon's umbra on the board to explain the eclipse.

自然老師在黑板上畫出月球的本影，用來解釋日食現象。

possessive: the moon's umbra

常見搭配
  • inside the umbra
  • the moon's umbra
  • the Earth's umbra
  • the umbra of the eclipse
  • umbra width
  • within the umbra
  • the edge of the umbra
同義詞
  • shadow

    much broader term — any dark area behind an object blocking light

  • darkness

    general condition of no light, not specific to eclipse geometry

反義詞
  • penumbra

    the outer, lighter part of a shadow where the light source is only partly blocked

文法句型

the umbra of [something]

inside the umbra

the + noun's + umbra

用法筆記

Frequently paired with penumbra (the lighter outer shadow). In astronomy writing, umbra is often used with a possessive noun to identify which object casts the shadow: the moon's umbra, the Earth's umbra.

常見錯誤

The umbra is the moon's shadow on Earth.
The umbra is the darkest central part of the moon's shadow on Earth.
the moon's whole shadow is not the umbra; the umbra is only the black core inside that shadow.

同根字

常見搭配

名詞搭配

常用片語

  • the edge of the umbra
  • the width of the umbra
  • inside the umbra

介系詞搭配