C2 noun /ˈʌm.brə/
Umbra
完全的阴影,太阳黑子的黑暗中心
Meaning
the fully shaded inner region of a shadow cast by an opaque object; the dark center of a sunspot
Example
During the eclipse, we stood in the moon's umbra.
在日食期间,我们站在月亮的本影中。