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Ice has difficulty in negotiating sharp corners.
冰很难越过尖锐的角隅。
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Shape (maintain straight lines and sharp corners).
形状（保持直线和直角）
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Why is the world full of sharp corners and other hazards?
为什么这个世界充满急转和其他冒险呢？
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Why is the world full of sharp corners and other hazards?
为什么这个世界充满急转和其他冒险呢？
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