rib [rɪb]

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n.肋骨，肋状物

a bone that curves round from your back to your chest

He broke a rib when he fell off his horse. 他从马上摔下来折断了一根肋骨。
He has broken a rib and the doctor has strapped it up. 他断了一根肋骨，医生已包扎好了。