广播电视英语短句 第 154 课：类风湿关节炎-5

Joints need cartilage for smooth movement and to absorb shock when you put pressure on a joint. 关节需要软骨在一个平稳的运动中活动，使它当你施压在关节上时能承受住震动。

Arthritis can be caused by injury, infection, an autoimmune disease or just long-term use. 通过受伤，感染，自身免疫疾病和长期的耗用都会引起关节炎。

Some forms are curable, others are not. 有的可以治愈，其他的则不会。

Some autoimmune forms of arthritis, if not treated, may cause joints to become deformed. 某些自身免疫的关节炎类型，如果不被治疗，可能会引起关节变形。

The most common form of arthritis, osteoarthritis, is more likely to affect older people. 大多数常见的关节炎、骨关节炎类型对老年人的影响可能更大。