Ultimately, rheumatoid arthritis can become worse over time and result in the limited ability to carry out routine activities since deformed joints result.
随着时间的过去，风湿性关节炎会越来越糟糕，最终因为关节变形会导致日常活动能力下降。
In this autoimmune disorder, the joints become painful, swollen, stiff and, in severe cases, deformed.
此种自身免疫性疾病造成关节疼痛、肿大、僵硬，更严重的可以造成关节变形。
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