narrow ribs
狭窄的肋骨
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Ribs should not be high or narrow; this makes it difficult for the material to flow.
加劲肋不要过高、过窄，因为这会造成材料流动困难。
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It is advantage United - who suffered a scare late on when Rio Ferdinand went off after suffering a blow to the ribs - but the narrow lead still leaves the semi-final in the balance ahead of next week's return game.
BBC: Man Utd 1-0 Arsenal
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