Tā zài zúqiú bǐsài zhōng shuāidǎo, féigǔ gǔzhé le.
He fell during the football match and fractured his fibula.
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腓骨: 腓 relates to the calf of the leg (with 月 flesh radical + 非), and 骨 means bone. Together: the bone of the calf. The paired bone, 胫骨 (tibia), is on the inside.