The sunbelt, in contrast, was home to eight of the ten states with the highest concentration of youth.
相比之下，这些阳光地带过去占了青少年聚集程度最高的前十个州中的八个名额。
2
Conclusion The density values of coronary plaques were found to be correlated with size, slice width and contrast medium concentration.
结论冠状动脉斑块的密度值与斑块大小、层厚及对比剂浓度相关。
3
Materials and Methods:Ferrous gluconate syrup as contrast agent, the suitable concentration was tested in vitro. And clinical experiments were studied in fifty patients with two groups in random.