uric acid crystal的用法和樣例：
例句
- Gout is a painful type of arthritis that results when uric acid crystals build up in the joints.
痛風是一種由尿酸結晶累積在關節導致的疼痛型關節炎。 - Because seafood is medium purine content is higher, the patient ate to form uric acid easily to crystallize inside body later, aggravating illness.
因為海鮮中嘌呤含量較高，病人吃了以後容易在體內形成尿酸結晶，加重病情。
