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单词
flint glass
释义
WordReference Random House Unabridged Dictionary of American English © 2024
flint
′
glass′,
[
Optics.
]
Optics
an optical glass of high dispersion and a relatively high index of refraction, composed of alkalis, lead oxide, and silica, with or without other bases, sometimes used as the diverging lens component of an achromatic lens.
1665–75
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更新时间:2025/11/16 10:09:25