1660s, from Modern Latin penumbra "partial shadow outside the complete shadow of an eclipse," coined 1604 by Kepler from Latin pæne "almost" + umbra "shadow" (see umbrage). Related: Penumbral.
中文解释
1、pen- + umbr- + -a.2、含义：partial shadow outside the complete shadow of an eclipse.
实用例句
1. The First Amendment has a penumbra where privacy is protected from governmental intrusion.
第一修正案在个人隐私不受政府侵犯方面较为模糊.
来自《简明英汉词典》
2. This includes the continuous survey of umbra and penumbra of the sunspot.
这包括对太阳黑子本影和半影持续的观测.
来自辞典例句
3. A penumbra of doubt surrounds the incident.
疑惑的阴影笼罩着该事件((真相不明)).
来自辞典例句
4. In additional, the luminance step is applied to detect the penumbra.
另外, 提出了亮度步长的方法来检测阴影中的半影.
来自互联网
5. Traditionally, the word wangliang has three different meanings penumbra and elf.
