This collagen is highly hydrated, it forms a gel that has water-like properties but it also has solid properties.

这些胶原蛋白是高度水合的,形成了既有水的特性,又具有固体特性的胶体

耶鲁公开课 - 生物医学工程探索课程节选

You load them into the top of a gel and a gel is - in this case it's synthetic polymer gel but it looks very much like Jell-O.

你把它安置在一段凝胶上,凝胶是--,这种合成凝胶聚合物看上去很像吉露果冻

耶鲁公开课 - 生物医学工程探索课程节选