In the elderly, the commonest type of arthritis is osteroarthritis, which is degenerative arthritis, most commonly affecting the knees.是什么意思_In the elderly, the commonest type of arthritis is osteroarthritis, which is degenerative arthritis, most commonly affecting the knees.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句