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单词 source of illumination
例句
原声例句
PBS人体科学

Two sources of illumination must differ by  between 5 to 10% to be detected.

两个照明源必须相差 5% 到 10% 才能被检测到。

世界奇趣图谱

The one tiny window was the only source of illumination, and the light that came in fell on a family of five.

那一扇小小的窗户是唯一的照明源,射进来的光落在一家五口的身上。

魔鬼经济学

Households that could not afford really nice sources of illumination would use lamps that burned the oil from baleen whales, which wasn't as nice.

买不起优质照明源的家庭会使用燃烧须鲸油的灯,但效果不太好。

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