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1.Opening by valves, as the capsule of a lily or iris.
瓣裂的由荚分开的，例如百合花或蝴蝶花的荚膜收藏指正
2.The apparently black circular opening in the center of the iris of the eye, through which light passes to the retina.
瞳孔暴露于眼睛虹膜中央明显的黑色圆形，光线通过此孔才能达到视网膜收藏指正
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