Arthritis is a disease of the joints — the places where two bones meet, like knees, fingers, hips, and the back. The joint swells, gets stiff, and hurts, often more in the morning or when the weather is cold and damp.

Arthritis is關節炎是 a disease of the joints一種發生在關節的疾病——the places where two bones meet, like knees, fingers, hips, and the back關節就是兩塊骨頭相接的地方，像膝蓋、手指、髖部和背部。The joint swells, gets stiff, and hurts關節會腫起來、變僵硬、疼痛，often more in the morning or when the weather is cold and damp常常在早上，或天氣濕冷時更嚴重。

This is a serious medical word, not a casual name for any sore knee.

This is a serious medical word這是一個嚴肅的醫學用詞，not a casual name for any sore knee不是隨口用來形容任何膝蓋痠痛的說法。

There is not just one kind: the common kind that comes with age and wear is different from the kind where the body's own defences attack the joints. People sometimes say “I have arthritis” for any old joint pain; that is a loose everyday use, and a doctor would want to know which kind.

There is not just one kind它不只有一種：the common kind that comes with age and wear is different from the kind where the body's own defences attack the joints隨年紀和磨損而來的常見類型，跟身體自身防禦系統攻擊關節的那種類型是不一樣的。People sometimes say "I have arthritis" for any old joint pain有些人會把任何老毛病式的關節痛都說成「我有關節炎」；that is a loose everyday use這是比較鬆散的日常用法，and a doctor would want to know which kind而醫生會想知道確切是哪一種。

You cannot catch it like a cold. It is usually a long-term condition. The person or joint is arthritic.

You cannot catch it like a cold它不會像感冒一樣傳染。It is usually a long-term condition它通常是長期性的病症。The person or joint is arthritic患者或關節可以說是arthritic（罹患關節炎的）。