| 单词 | penumbral |
| 释义 | penumbral (once / 168848 pages) adj WORD FAMILY penumbral USAGE EXAMPLESAnd one by one we tumbled back out into the street, the sky dark but with a faint penumbral glow of coming morning. New York Times(Oct 21, 2016) It coincided with a minor, penumbral lunar eclipse for many people in Asia and Africa. BBC(Sep 17, 2016) Don’t panic—the ominous sight is a perfectly normal penumbral eclipse. National Geographic(Sep 14, 2016) adj of or pertaining to the region of partial shadow around an umbra |
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