http://www.pons.de/produkte/3-12-517841-X/（牛津大学出版社授权产品）
英语
西班牙语
penumbra <pl penumbras or penumbrae [-briː]> [美 pəˈnəmbrə, 英 pɪˈnʌmbrə] 名词
- penumbra
- penumbra f
西班牙语
英语
- penumbra
- penumbra
在《PONS词典》中的词汇
- penumbra 天文
- penumbra
在《PONS词典》中的词汇
- penumbra 天文
- penumbra
无例句可用
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单语范例（未经PONS编辑处理）
Co source is about 2 cm in diameter and as a result produces a geometric penumbra, making the edge of the radiation field fuzzy.
en.wikipedia.org If two penumbras overlap, the shadows appear to attract and merge.
en.wikipedia.org It is believed that mitochondria play an essential role in the metabolism of astrocyte energy within the penumbra of ischemic lesions.
en.wikipedia.org His contribution over the period of two decades was irreplaceable and all of our postwar history exists in the penumbra of his work.
en.wikipedia.org A penumbra case would be one not considered by the creators of the law, such as a skateboard in the example above.
en.wikipedia.org