During the day the lower limit is about 8 to 10 times the aperture.
白天时的下限是孔径的8到10倍。
The lower leg is represented by the medial crura whereas each upper leg consists of a lateral crural complex based bilaterally on the piriform aperture.
下方的腿代表的是内侧脚，同时上方两条腿则代表双侧的梨状孔上的外侧脚复合体。
In optimized design, damped least squares method and adaptive procedure are used to get higher relative aperture, lower distortion and appropriate MTF, and so on.
在光学系统优化设计的过程中，应用阻尼最小二乘法和适应法解决了大相对孔径、低畸变和MTF匹配等问题。
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