表面作用剂是指肺泡上的脂质分泌物。

Surfactant is the name given to the lipid secretions that lie in the alveoli.

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血液相容性是一个涉及血液和生物医学材料表面作用的复杂现象，影响因素繁多。

Haemacompatiblity is a complex phenomenon which touch on the interactions between blood and biomedical materials surface. There are lots of factors that influence the interactions.

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但是，关于招标制度的研究还只限于表面作用的观察，而对于其在经济学深层次意义上的探讨还十分欠缺。

However, the traditional research only limited in the observation about surface impact, lack the deeper probing in economics.

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So, it interacts with receptors called insulin receptors that are on cells that are sensitive to insulin.

它与细胞表面胰岛素受体相互作用,这些细胞对胰岛素很敏感

耶鲁公开课 - 生物医学工程探索课程节选

One says, leave any body near the Earth, it yields a force.

有人说,在地球表面的任何物体,都会受到力的作用

耶鲁公开课 - 基础物理课程节选

That infection occurs because of a ligand receptor interaction on the cell surface where the virus itself is the ligand and it takes advantage of a receptor that's expressed on the cell surface.

感染的发生是由于,配体与细胞表面受体相互作用,病毒是配体,它利用了在,细胞表面表达的受体

耶鲁公开课 - 生物医学工程探索课程节选