以下为句子列表：
英文: A concave molding with a cross section that approximates a quarter circle.
中文: 飞檐的凹圆线脚截面近于九十度弧的凹线脚
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英文: A depression similar to that in a shallow concave container for food.
中文: 凹形，凹面与浅的凹型盛食物的容器相似的凹处
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英文: A long stick with a concave attachment at one end for shoving disks in shuffleboard.
中文: 推铲一端带有凹头的长棒，用于在打圆盘游戏中推动圆盘
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英文: A mastectomy by itself would result in a concave chest front, no nipples, and more obtrusive scars.
中文: 要是单纯的乳房切除，那可能只是使胸部前方凹陷，没了乳头，以及留下明显的疤痕。
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英文: A pattern structure in substrate can be formed through connecting many small concave spherical structures formed by chemical etching.
中文: 通过腐蚀，硅衬底上会出现一组凹球面状的微结构，具有一定轮廓特征的微结构可以由一组这样的凹球面微结构拼接而成。
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