Here is a thin membrane, it's a polymer scaffold, and on that polymer scaffold scientists have placed some skin cells and they've allowed it to grow.

这是一张薄膜,它是一个聚合物支架,在这个支架上,科学家放了一些皮肤细胞,并让它们生长

耶鲁公开课 - 生物医学工程探索课程节选

Even if that beaker had all the nutrients that skin cells needed they wouldn't survive very well in solution, they tend to need to be stuck to a surface in order to survive.

即使供给它们所有所需的养分,它们也不能在溶液中正常存活,皮肤细胞倾向于贴壁生长

耶鲁公开课 - 生物医学工程探索课程节选