penumbra
英[pɪ'nʌmbrə]
美[pɪ'nʌmbrə]
- n. 半影
词态变化
复数: penumbras;
助记提示
1、pen- + umbr- + -a.
2、含义：partial shadow outside the complete shadow of an eclipse.
中文词源
penumbra 半影
来自拉丁语paene,几乎，接近，umbra,阴影，全影，词源同umbrella.
英文词源
- penumbra
- penumbra: see umbrage
- penumbra (n.)
- 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.
双语例句
- 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.
- “罔两”一词历来向有“无据依”、“景外微阴”及“精怪”三义.
来自互联网