软骨损伤程度亦随病程延长而加重。
The extent of cartilage damage was also getting more severe along with the history.
目的：软骨的损伤与修复是临床长期存在的一个难题。
Objective: The injury and repair of cartilage is a long-term existed problem.
目的：软骨的损伤与修复是临床长期存在的一个难题。
Objective: The injury and repair of cartilage is a long-term existed problem.
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