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This is called a rarefaction and is represented by widely spaced dots .

这个区域称为稀疏区，并用疏散的小点表示。

Clinical observation of diabetes type 2 followed by rarefaction of bone .

2型糖尿病伴随骨质疏松的临床观察。

Spermatophyte flora ; phylogenetic diversity ; latitude gradient pattern ; rarefaction analysis .

种子植物区系；系统发生多样性；纬度梯度格局；稀疏分析。

Hypertensive retinopathy ; apoptosis ; capillary ; microvascular rarefaction .

高血压视网膜病;细胞凋亡;微血管稀少。

Clinical observation on treating 102 cases of ankylosing spondylitis complicated with bone rarefaction and osteopenia with bushen qiangdu fang .

补肾强督方治疗强直性脊柱炎骨质疏松、骨量减少102例临床观察。