umb
ra
复数形式
umbras
1
本影, 阴影
the part of a shadow that is completely dark; caused by acute light blockage
- 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一个本影。
- In a total solar eclipse, the umbra creates complete darkness.
在日全食中，本影创造了完全的黑暗。
- The umbra of the building provided shade from the hot sun.
建筑物的本影提供了遮挡烈日阴凉。
- Standing in the umbra of the tree, they escaped the summer heat.
站在树的阴影中，他们逃离了夏日的炎热。
- The shadow's umbra was clearly defined against the bright background.
阴影的本影在明亮的背景下清晰可见。