joint fluid关节液
synovium滑膜[s?‘n??v??m
a thin membrane in synovial (freely moving) joints that lines the joint capsule and secretes synovial fluid
cartilage[‘kɑ?t(?)l?d?]软骨
Cartilage is a strong, flexible substance in your body, especially around your joints and in your nose
rheumatoid[‘r?m?t??d]
rheumatoid arthritis 风湿性关节炎
a chronic autoimmune disease with inflammation of the joints and marked deformities; something (possibly a virus) triggers an attack on the synovium by the immune system, which releases cytokines that stimulate an inflammatory reaction that can lead to the destruction of all components of the joint
osteoarthritis骨关节炎
chronic breakdown of cartilage in the joints; the most common form of arthritis occurring usually after middle age
arthritis [ɑ?‘θra?t?s]关节炎
inflammation of a joint or joints
meniscal[‘m?n?skl】半月板的
meniscal tear 半月板撕裂
calf小腿
our calf is the thick part at the back of your leg, between your ankle and your knee
upper calf小腿上段
Lyme disease莱姆病
quadricep复合腿部训练机 [‘kw?drisep]
patellar ligament膝韧带
原文：http://www.cnblogs.com/biopy/p/4767735.html