目的：通过电镜观察胆固醇结石内的细菌形态学变化，探索细菌在成石中的作用。

Objective: to observe the morphological change of bacteria in the cholesterol stone under electron microscope and to explore the action of bacteria in the formation of stone.

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研究表明，砂岩层内的早期成岩作用(压实、压溶、胶结和交代作用)使孔隙度和渗透性降低。

Researches show that in the early stage of sandstone diagenesis, compaction, pressure solution, cementation and replacement reduce both the porosity and the permeability.

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目的观察经皮自体骨髓移植在骨缺损瘢痕组织内的成骨作用。

Objective to observe osteogenesis of percutaneous autogenous bone marrow into cicatrix of bone defect.

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When they do that they can actually engulf the bacteria in a process called phagocytosis and break them down into antigens.

免疫细胞确实是将细菌整个吞进了肚内,这一过程称为吞噬作用,并将细菌分解成小抗原

耶鲁公开课 - 生物医学工程探索课程节选