For now, just picture it in this simple way as a molecule, usually a protein, that's embedded in the cell membrane and many receptors have a part of them that is extracellular.

现在,我只把这种分子图示出来,受体通常是一种蛋白质,它们镶嵌在细胞膜上,很多受体还有部分结构露在细胞外

耶鲁公开课 - 生物医学工程探索课程节选

The adult learner gets tremendous value if the educational institution is able to provide the environment where a lot of working takes place, where friendships are made, where connections are made and can be used outside later beyond the confines of the educational environment.

成年学者会有很多收获,只要教育体系能够,提供一个环境，在这里,存在大量的工作，但能够建立友谊，还能创建人际关系,并且之后在学习环境外,也能利用到这种关系。

麻省理工公开课 - 媒体、教育、市场课程节选