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penumbra [pɪ'nʌmbrə] n
gen. 半阴影
avia. 黑影周围的半阴影
met. 半影; 半阴影
tech. 画面浓淡相交处
penumbra
: 6 phrases in 5 subjects
Agriculture1
Computers1
Electronics1
Space1
Technology2

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