疏松区

淋巴结外包被膜，实质由疏松区和致密区组成。

The lymph nodes are consisted of the capsule , loose areas , and dense areas .

在解决生产过程中铝合金点焊质量难题时，发现铝合金电阻焊接头中存在一个疏松区，从而将电阻焊接头从外向内分为塑性环、承力致密区和疏松区；

While soluting the quality trouble of Al-alloy in resistance spot welding , a loose area is discovered in joint .

结果表明：磨削损伤的主要形式有显微塑性变形磨痕、断裂剥落坑、磨削微裂纹和材料疏松区的塌坑；

It is showed that : ( 1 ) the major surface damage patterns due to grinding are microplastic deformation trace , fracture chipping pit , microcracks , and subsidence in the loosen region of material ;

初步认为，Na2O-CaO-SiO2系统玻璃结构可按组成划分为组群状结构区、三维网络碎片结构区、三维无限网络结构区和疏松网络结构区等四个区域。

Four structural regions existed in the glasses are given by the authors , i.e. , isolated-form structure , three dimensional network fragment structure , three dimensional infinitive network structure and loose three dimensional network structure .