采用V - E PC铸渗工艺制备铁基颗粒复合材料，并对复合材料硬度及显微组织分布特征进行了研究。

The V-EPC cast-in process was used to prepare the cast iron-based particles -containing composite. The distribution characteristics of the hardness and microstructure of the composite was studied.

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目的：通过检测基质金属蛋白酶- 1 (MMP - 1)在慢性牙周炎牙龈组织中的表达和分布特征，探讨MMP - 1在慢性牙周炎发病中的作用和临床意义。

AIM: To determine the distribution of matrix metalloproteinase (MMP) -1 in the gingiva of chronic periodontitis and investigate the role of it in the pathogenesis of chronic periodontitis.

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雷达组合反射率因子图上，MCS 表现为回波组织性强、模态清晰，或移动，或静止，MCS 雷达回波分布特征决定雨带走向和落区；

The radar echoes for those MCSs are organized well, and some MCSs are moving, others are quasi-stationary. The echo distributions of MCSs indicate the precipitation areas.

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