| 单词 | aperture |
| 释义 | Word Frequency aperture(ˈæpətʃə) noun 1. a hole, gap, crack, slit, or other opening 2. physics a. a usually circular and often variable opening in an optical instrument or device that controls the quantity of radiation entering or leaving it b. the diameter of such an opening See also relative aperture Word origin C15: from Late Latin apertūra opening, from Latin aperīre to open |
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