深度学习
penumbra (pen UM bruh) A word often used in astronomy, this noun means “partial shadow,” the area between complete illumination and total eclipse. It can also be used figuratively to mean “an area in which something exists to an uncertain degree.”
- “Although our dress code is very strict,” said the headmaster, “wearing certain items of clothing, such as shorts, on warm-weather days falls under the penumbra of ‘exceptions due to climate.’”
- Anxious to avoid the summer heat but wanting to tan herself, Danielle sat down in the penumbra under a leafy tree.
——摘自《Fiske WordPower: The Most Effective System for Building a Vocabulary That Gets Results Fast》
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半影（pen UM bruh）天文学中经常使用的一个词，这个名词的意思是“部分阴影”，即完全照明和日全食之间的区域。它也可以象征性地用来表示“某个事物存在到不确定程度的区域”
“尽管我们的着装规定非常严格，”校长说，“但在温暖的天气里穿着某些衣服，如短裤，属于‘气候例外’的半影。”
丹妮尔急于避开夏天的炎热，但又想晒成棕褐色，于是她在半影下的一棵绿树下坐了下来。
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