It relies on a network of 80 peddlers who make a living out of pedaling to recharge the lights or cell-phones of their neighbors.

VOA: standard.2010.02.24

They might ingest extracellular antigen, presented pieces of it on their cell surface in the context of MHC-2.

它们可以吞噬胞外抗原,根据细胞表面的,主要组织相容性抗原-2

耶鲁公开课 - 生物医学工程探索课程节选

Another characteristic of the synapse is that the post-synaptic membrane, the membrane of the cell which is going to receive the signal has receptors on it.

突触的另一个特征是,它们都有一个突触后膜,这个膜上含有受体,可以接受信号

耶鲁公开课 - 生物医学工程探索课程节选

It's - this picture on the bottom shows the cell stuck to plastic.

如图所示,细胞紧紧地贴在塑料片上

耶鲁公开课 - 生物医学工程探索课程节选

Because it has MHC-1, your MHC-1 on it, this T-cell recognizes that it's one of your cells but it has a foreign antigen associated with it.

因为该细胞上有MHC-1,T细胞将这些细胞识别为自身细胞,但这些细胞带有异己抗原

耶鲁公开课 - 生物医学工程探索课程节选

The G-protein then goes on to create some other biochemical changes inside the cell.

然后G蛋白在细胞内,诱发其它的一些生化反应

耶鲁公开课 - 生物医学工程探索课程节选