At least this picture is worth a thousand words.

来源: 7grizzly 于 2023-04-06 20:56:52 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)
回答: like so, diaphragm & aperture 由 移花接木 于 2023-04-06 18:57:26
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