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单词
principal ray
释义
principal ray
noun
1.
:
principal visual ray
2.
:
the one ray of the rays entering an optical instrument from any given point of the object that passes through the exact center of the aperture stop
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dite
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ditentive
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dither
dithered
dithery
dithi
dithi-
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dithiocarbamic
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更新时间:2025/7/11 1:15:47