This property of cells in culture is called anchorage dependence - that the cell needs to be anchored to a surface in order to function properly.

体外培养细胞的这种特性,称为贴壁依赖性--,意思是细胞必须固定在,某个表面上才能正常生长

耶鲁公开课 - 生物医学工程探索课程节选

If the sheep grows up in the right way, and people have shown that this will work, you can milk the sheep, the sheep has milk, the milk has insulin in it.

如果绵羊正常生长,人们已经证明这的确可行,你可以为绵羊挤奶,绵羊会产奶,而羊奶中有胰岛素

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