Of an instrument or apparatus: constructed to assist vision; acting by means of light; spec. operating in the visible part of the spectrum as…
| 单词 | θ64983 |
| 释义 | the world > physical sensation > sight and vision > optical instruments > [adjective] > to assist the sight (1) optical1748 Of an instrument or apparatus: constructed to assist vision; acting by means of light; spec. operating in the visible part of the spectrum as… |
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