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Umbra
01
影子, 暗影
the part of a shadow that is completely dark; caused by acute light blockage
Example
During the eclipse, the moon cast an umbra on the Earth's surface.
在日食期间,月亮在地球表面投下了暗影。
In a total solar eclipse, the umbra creates complete darkness.
在一次全面日食中,暗影造成完全的黑暗。