这是一个强直性脊柱炎患者的骨盆正位片，显示双侧骶髂关节炎，伴随硬化与关节间隙狭窄。
This radiograph of the pelvis of a patient with ankylosing spondylitis shows bilateral sacroiliitis with sclerosis and narrowing of the sacroiliac joints.
膨胀的最低的小穗轴节间和贴生的更低的颖片形成这。
This is formed by the swollen lowest rachilla internode and adnate lower glume.
小穗对的花梗等于，倍于轴节间；上面颖片具0。5 - 1毫米短尖头。
Pedicels of spikelet pair equal, as long as rachis internode; upper glume with 0. 5-1 mm mucro.
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