penumbra
发音
英 [pəˈnʌmbrə]
美 [pɪˈnʌmbrə]
-
- n.
- 黑影周围的半阴影
- 半影
- 边缘
- 外围
单词词源
penumbra 半影
来自拉丁语paene,几乎，接近，umbra,阴影，全影，词源同umbrella.
双语例句
- 1. Fortunately , at my location near athens , greece , I enjoyed pristine transparency ( ideal viewing conditions ) for this eclipse , where 40 percent of the lunar disk entered the penumbra .
- 幸运的是，当时我的拍摄场地靠近于希腊的雅典，在那里月盘大概有40%进入了半影带，才使我欣赏到这次月食的原始透明度（理想的观察条件）。
- 2. Conclusion hsp70 was sensitive marker of ischemic damage , the anatomic distribution of hsp70 expression could be thought as ischemic penumbra .
- 结论hsp70是缺血神经元损伤的敏感指标，缺血皮层区hsp70表达的解剖分布可能相当于半影区。
- 3. However , as the entire moon will cross the penumbra partial shadow of the earth , it will appear significantly dimmer around the time of partial eclipse .
- 但由于整个月球会经过地球的半影，在接近月偏食时，月球会明显较暗。
- 4. The next eclipse of the sun will occur late on june 1 , when the path of the moon 's outer shadow , or penumbra , will cross alaska , northern canada , siberia , and northern china .
- 下次日偏食将发生在六月一号的晚些时候，届时月亮的外周阴影或是半影，将会波及阿拉斯加，加拿大北部，西伯利亚和中国的北部地区。
- 5. Note that the " pre-p1 " image was taken four minutes prior to the predicted first contact of the moon with the penumbra .
- 注意，“pre-p1”的这张照片，是在预测的月亮与半阴带开始接触的4分钟前所拍摄的。