penumbra
英 [p?'n?mbr?]
美[p?'n?mbr?]
- n. 半影
GRE暢通詞匯
詞態(tài)變化
復數(shù):?penumbras;
助記提示
1、pen- + umbr- + -a.
2、含義：partial shadow outside the complete shadow of an eclipse.
2、含義：partial shadow outside the complete shadow of an eclipse.
中文詞源
penumbra 半影
來自拉丁語paene,幾乎，接近，umbra,陰影，全影，詞源同umbrella.
英文詞源
- 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 p?ne "almost" + umbra "shadow" (see umbrage). Related: Penumbral.
雙語例句
- 1. The First Amendment has a penumbra where privacy is protected from governmental intrusion.
- 第一修正案在個人隱私不受政府侵犯方面較為模糊.
來自《簡明英漢詞典》
- 2. This includes the continuous survey of umbra and penumbra of the sunspot.
- 這包括對太陽黑子本影和半影持續(xù)的觀測.
來自辭典例句
- 3. A penumbra of doubt surrounds the incident.
- 疑惑的陰影籠罩著該事件((真相不明)).
來自辭典例句
- 4. In additional, the luminance step is applied to detect the penumbra.
- 另外, 提出了亮度步長的方法來檢測陰影中的半影.
來自互聯(lián)網(wǎng)
- 5. Traditionally, the word wangliang has three different meanings penumbra and elf.
- “罔兩”一詞歷來向有“無據(jù)依”、“景外微陰”及“精怪”三義.
來自互聯(lián)網(wǎng)