| 单词 | umbra |
| 释义 | umbra (once / 18101 pages) n WORD FAMILY umbra: umbrae, umbras USAGE EXAMPLESThe most striking pictures are from the “Umbra” and “Starburst” series, in which oblongs or elongated triangles in various colors wheel around a central void. Washington Post(Aug 03, 2016) The moon casts its dark central shadow, called the umbra, onto a very narrow strip along the surface of the Earth. National Geographic(Mar 09, 2016) Umbra is not certain that being more human is something the android should evolve toward. The New Yorker(Jan 13, 2016) n a region of complete shadow resulting from total obstruction of light Hyper shadow shade within clear boundaries |
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