“apparent visual angle”的概念、定义、翻译、参考文献-科学参考

单词	apparent visual angle
释义	apparent visual angle [ǝ`pa·rǝnt `vizh·ǝ·wǝl `aŋ·gǝl] ^OPTICS The angle subtended by a source at the observer's eye as calculated from the source size and distance from the eye.
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