If you look at this picture of this fibroblast you can imagine that it's firmly stuck up here.

看了这张成纤维细胞的图片,你就能想像它黏附的有多么紧密了

耶鲁公开课 - 生物医学工程探索课程节选

That's how tight the junctions are, not even a small molecule like glucose can pass between them.

可见胞间连接多么紧密,甚至像葡萄糖这样小的分子也不能通过

耶鲁公开课 - 生物医学工程探索课程节选

Right, we see in this passage something that reveals so much about what the Greek values were and you'll see how closely they were tied up with the polis and the primacy of the polis in their lives.

对的,我们在这篇文章中,看到了很多揭示希腊人价值观的东西,你们能看到他们和城邦以及城邦在他们,生命中至高无上的地位之间有多么紧密相连

耶鲁公开课 - 古希腊历史简介课程节选